Hi all. I want to convert a single speed Raleigh roaster to a 3 speed. The rear rim is 40 holes and 28inch 635 mm, and this frame only uses a front rod brake (rear is coaster only). I currently have a sturmey archer tcw hub from 1963 which has 40 holes but I hear these hubs are not to be used without a supplementary rear brake because the brake is driven through the drive gears. I also have a sc3 laced to a 26 inch echoing RIM but the shell is only 36 holes. I cant seem to come across a 40 hole sc3 hub and would rather not pay for one if I can convert this tcw shell with the sc3 innards. Does anyone know if it is possible to put the sc3 innards into a tcw shell? Thank you