[DanBar]

Maybe this will help, according to my B&M instruction sheet the weights go from 1 to 6. 1 being the heaviest 6 being the lightest. the springs go purple blue green yellow orange red in that order. purple is the stiffest spring and red is the lightest.
First gear late shift excessively light spring on weight.
High gear to soon excessively heavy weight.
the plain steel unmarked spring looks like a stock factory weight. Dan