I finally figured out what the hole spacing on the 3D models is that Lynxmotion has available for download! I can now model parts or create new parts that are compatible with the Lynxmotion 3D models! I’ve already attached legs created with the Lynxmotion models to a body I designed for my crawler/walker robots. 
I can now also use parts that don’t currently seem to work right in the Lynxmotion 3D model set, because I can model my own parts. 
I have already done this for the AHC-03 hexagonal hub, and have changed the hole spacing. Now I have an AHC-03 that actually lets me connect things to all 6 faces of the part!
8-Dale
And you’re keeping it all to yourself? Cruel. 
If you’d like me to post the model so everyone can download it, just email it to me. 
No, of course I won’t keep it to myself. The spacing between the smaller 0.047" radius holes and the larger 0.158" radius holes in the Lynxmotion hole pattern is 0.3280". As soon as I double check the new AHC-03 model with the different hole spacing and make sure it mates with Lynxmotion models on all six faces, I will send it to you in a STEP file.
8-Dale
I just send ahc-03.zip with three files - STEP 214, IGES, and native Alibre Design part. Let me know if you did not get it. Now that I know I can create Lynxmotion part compatible models, I can see about fixing other model problems, like with the HUB-09 and servo.
I am already working on a new servo model. I just finished the top cover, which mates to all 4 holes perfectly on the asb-04 bracket.
8-Dale
I have already done this for the AHC-03 hexagonal hub, and have changed the hole spacing. Now I have an AHC-03 that actually lets me connect things to all 6 faces of the part! 
If you’d like me to post the model so everyone can download it, just email it to me. 
