i have a 1947 DoAll with a 2 speed gearbox .a really solid saw-
and doall still carries parts . it can take up to a 1" band ,
but i typically run 3/4" -10 , for gp sawing , 3/4"-6 for thick wood,
and 1/4"- 10 for contour cuts .
for my purposes, bi-metal bands are a waste of money -...