Add new REV D version of BTU mod (#27)
- This updates the BTU top to the REV D version of the Ploopy top, which is screwed together using self-tapping screws instead of M3 screws with threaded inserts. - This is untested so use at your own risk. There may be another change brought in with REV D that I've missed, and not copied into the mod's REV D.
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@ -9,10 +9,17 @@ Ball transfer units (or BTUs) are omnidirectional bearings, as opposed to the si
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This mod is a new 3D-printable top piece for the Ploopy which contains holes for ball transfer units instead of roller bearings.
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This mod is a new 3D-printable top piece for the Ploopy which contains holes for ball transfer units instead of roller bearings.
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Designer: [George Bryant](https://github.com/gbrnt) with help and bearing advice from [/u/d4baller](https://reddit.com/user/d4baller)
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Designer: [George Bryant](https://github.com/gbrnt) with help and bearing advice from [/u/d4baller](https://reddit.com/user/d4baller)
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## Versions
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## Versions
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### REVD-BTU
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This version is the version you should use if you have a REV D Ploopy top.
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You can check this on the underside of your original top - there should be a large letter D,
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and your screws will be self-tapping screws.
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It supports both the original ball and the new larger (45mm) ball.
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### REVC-BTU
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### REVC-BTU
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This version is the version you should use.
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This version is the version you should use if you have a REV C Ploopy top.
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You can check this on the underside of your original top - there should be a large letter C,
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and your screws will be M3 screws.
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It supports both the original ball and the new larger (45mm) ball.
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It supports both the original ball and the new larger (45mm) ball.
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### v3 and v4
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### v3 and v4
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@ -50,7 +57,7 @@ Follow [Ploopyco's recommendations for print settings](https://github.com/ploopy
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* Install the new top piece on the trackball.
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* Install the new top piece on the trackball.
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* Give it a try!
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* Give it a try!
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### Threaded inserts
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### Threaded inserts (Ignore if using REV D)
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You'll need 4 heat-set M3 threaded inserts for the screws which attach the top to the base.
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You'll need 4 heat-set M3 threaded inserts for the screws which attach the top to the base.
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These can be bought from a variety of sources - you should use ones which are made for 4.0 - 4.2mm holes.
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These can be bought from a variety of sources - you should use ones which are made for 4.0 - 4.2mm holes.
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Recommendations for installing these are in the [Ploopy trackball assembly guide](https://github.com/ploopyco/trackball/wiki/Ploopy-Trackball-Kit-Assembly).
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Recommendations for installing these are in the [Ploopy trackball assembly guide](https://github.com/ploopyco/trackball/wiki/Ploopy-Trackball-Kit-Assembly).
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