@ChrisG Great effort in applying sound engineering judgement. Your approach is good though your conclusion leaves out a number of factors. We have discovered that the new rear triangle is actually STIFFER than the old bike, through both controlled lab testing and field testing. This was achieved by oversize tubes, specific carbon layup, the addition of 2 bearings, upsizing of 6 bearings, wider bearing stance at the pivots and the rear square axle. All at reduced weight.