ok so I drilled the 4 lugs with no problem. I simply tried to fit it with longer screws to connect with stock sprocket, placed it above the hub, and nut betwen 47t and stock 55t to serve as a spacer so it doesn't rub.
while it looks works fine, when I tried to put it on chassis, it creates further issues. the screw head rub with the frame because of its protude location, if I put the chain on it, it might rub the chassis also. I probably could get away with adjusting the spacer, but it would be more complicated and the tire won't be on the center also I believe. Could you send me your address to I can send the sprocket to your way and back Rob? I will measure the opening, I believe this is the correct way to get it done, so the new sprocket will be on its original position. my email is firstname.lastname@example.org
. thanks in advance Rob