pic: 3 Motor Single Speed Gearbox

[NickE]

If you're gonna mill the plates, you're gonna need some exterior fillets. If you're gonna jet them, you're probably fine, but I still like having the fillets there for cosmetic reasons.

Originally Posted by CraigHickman

A bit of a suggestion: If you can recess the standoffs to allow the box to 'snap' together, it makes assembly much easier, and makes aligning parts much quicker.

Having counterbores for the standoffs certainly keeps everything more ridgid, but i would say makes assembly much more difficult. Lining up every standoff with its corresponding hole can be quite a challenge (which would probably become even harder with these being the motor mount screws). If you're gonna include counterbores for the standoffs, do not do it on all six standoffs. Even with just four counterbored standoffs on our gearboxes this year, it was still quite a challenge to line them all up.