Black 3D-printed base converters in round, oval, square and rectangular shapes, shown as example prints from the STL pack.

Open Basing System Sizes and Shapes Converters

OBS Converters Regular Licence
$11.50
$11.50
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Black 3D-printed base converters in round, oval, square and rectangular shapes, shown as example prints from the STL pack.
  • Black 3D-printed base converters in round, oval, square and rectangular shapes, shown as example prints from the STL pack.
  • OBS Round Bases Sizes Converters - Various diameter adapters for round wargaming miniature bases
  • OBS Square to Square Converters - Isometric view of various size adapters for square wargaming bases
  • OBS Rectangle to Rectangle Converters - Isometric view of various size adapters for rectangular wargaming bases
  • OBS Oval to Oval Converters - Isometric view of various size adapters for oval wargaming bases
  • OBS Oval to Rectangle Converters - Isometric view of adapters transforming oval bases to rectangular shapes for wargaming miniatures
  • OBS Rectangle to Oval Converters - Isometric view of adapters transforming rectangular bases to oval shapes for wargaming miniatures
  • OBS Round to Oval Converters - Isometric view of adapters transforming circular bases to oval shapes for wargaming miniatures
  • OBS Round to Square Converters - Isometric view of adapters transforming circular bases to square shapes for wargaming miniatures
  • OBS Square to Round Converters - Isometric view of adapters transforming square bases to circular shapes for wargaming miniatures
  • Closeup of OBS round base fitted in a converter - Detailed view showing the tight fit and design of the conversion system
  • Closeup of OBS 50x24mm rectangular base fitted in a converter - Detailed view showing the precise fit and design of the conversion system for specific base sizes
  • 3D interactive model of OBS 25mm round base assembly in converter - Extended Reality (XR) view demonstrating the fitting process and converter design
  • 3D interactive model of OBS 50x24mm rectangular base assembly in converter - Extended Reality (XR) view showcasing the fitting process and converter design for specific base dimensions
Open Basing System Sizes and Shapes Converters

Open Basing System Sizes and Shapes Converters

$11.50
$11.50
Shipping calculated at checkout.
Licence
Quantity
In stock

Same-day dispatch before 3pm Mon–Fri · Free UK delivery over £70 · 30-day returns

DWG · Product Information

PROJ: OBS/CONV/RL · SHEET 2 / 4

View · Overview

Product overview

This product is a downloadable digital STL file pack; no physical converters will be shipped. It contains 315 Open Basing System converter files for changing the size or shape of an existing miniature base without replacing it. The pack covers oval, rectangle, round and square converters, including transitions between those shapes. Each converter uses a tight-fit frame that holds the original base without magnets or glue, while an opening underneath allows it to be pushed back out. The files are printed by the buyer using their own 3D printer and chosen material.

  • Includes 315 designs covering oval, rectangle, round and square conversions.
  • Tight-fit construction holds the base without magnets or glue.
  • An underside opening allows the fitted base to be pushed back out.
  • Designed around OBS dimensions and may not fit bases from other manufacturers.
  • Regular Licence covers personal, non-commercial printing; Commercial Licence permits selling prints and includes OBS reseller permission.
  • Includes one year of download access and free updates; the link then expires and access is renewed by repurchasing.

Compatible with popular tabletop miniatures; not affiliated with, endorsed by or produced by Games Workshop.

Notes · Q & A

Can a converter change my base footprint without rebasing?

OBS converters are designed to adapt an existing base where the selected conversion route fits that original footprint. Fit is route-specific, so confirm the selected option and technical drawing before ordering. Check Technical Specifications where added height matters.

How do I choose the correct converter?

Start with the footprint you already have, then select the target footprint you need. Compare both the accepted inner fit and the outer footprint with the technical drawing; matching nominal labels alone is not enough.

How should I use the technical drawing?

Choose your option first, then use the technical drawing and Technical Specifications to check the physical dimensions of the product. When matching an existing part or accessory, use the drawing rather than relying on the product name alone.

Can I rely on the nominal size alone?

No. Products with similar nominal sizes can have different physical dimensions or fit differently across brands and systems. Check the technical drawing, specifications and any product-specific compatibility note before ordering.

Notes · Logistics

Shipping

Orders placed before 3PM (Mon–Fri) are dispatched same day. Free UK delivery on orders over £70. International shipping available.

Returns

If you're not happy with your purchase, contact us within 14 days for a full refund or exchange. Items must be unused and in original packaging.

Table · Specification

Technical specifications

Product details
Brand
Hobby Heaven
Product code
OBS/CONV/RL
Type
Digital Product
Classification
Range
Base Converters
Format
Digital (STL)

Product

Open Basing System Sizes and Shapes Converters

Code (proj)

OBS/CONV/RL

Brand

Hobby Heaven

Hobby Heaven · Open Basing System

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