beau-tech golf

I purchased a set of 6.0 flighted shafts to assemble a set of MMB-17 Blacks. The golfer likes DG S300’s and I was looking to do a ‘close’ match to those and realize I should have got 5.5’s. Thinking of soft stepping the shafts by one. Would this result in ‘5.7’ish flex?

Thanks.

Pete Beau

Britt Lindsey answered ago