The grip is round. I'm not expecting this wheel to be a huge seller, if I can offer it at the right price, some will buy. I wasn't sure about the Borgeson box when I made the coupler and fittings, and sold about 70 this year.
have you tried mfg.com to try and source a manufacturer? i have used them in the past for short runs of custom parts, its great you can upload your files and specify materials.
