Just came in from tuning my new 150 grn Wensel Woodsman screw ins. Shooting at "The Block" 15 to 20 yrds , WEll AFTER 2 Shots per Broad head and minor adjustments flight got worse! I think concentrate on form,, third array of arrows loosed, even worse, then some extreme scrutiny revealed that Low and behold the foam block in all its durability had rolled the tips on 5 of the 6 woodsman's 4 rather severely ...Temp here is 56, so block not hard feels soft to touch, any one else had this experiance. fyi just shot magnus 2 blades no problem with tips???????