All this has to do with right brain left brain stuff some people do things 1,2,3, by the numbers and then other folks do things by logic I ain't sayin' that one is better than the other, just that's the way different folks think. Decide your gonna do it and don't spare the horses. If you want a wheelock then make one ,if you make a part wrong don't get angry just start over.
I ask my dad once how to carve a squirrel from a piece of wood and he told me just to cut everything off that didn't look like a squirrel ,OK do the same thing with a wheelock part and if that part doesn't work learn from your mistake and make one that works . Once you make one that works you can take each part to a mechanist and he'll make you a 100 of them in the time it takes you to drink a cold beer. Patience and determination. If you have questions I'll help all I can