I have one with a 1.5" pin. About the same drilling as you but no WH. Yours looks weird with that low WH with such a high CG...but I am no driller so it is very possible that I could be wrong. LOL
Have you polished it yet? Mine is a monster polished! It retains energy very well and gives me a slight angular move at the breakpoint. I think that your may be using a lot more energy in the midlane and thats why you aren't getting the reaction on the back your looking for.
On the other hand...smooth is a wonderful thing, it can get you out, or keep you out of trouble on some nasty conditions...
BMM
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Roto Grip forever!!!! What else is there??
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