I have just installed tail wheel mount and discovered it is near impossible to buck the lower rivets on the aft rib. Having checked this forum, I am not alone, and most have used cherry CR3212-4 rivets. My question is how to accomodate the countersunk head of the cherry rivet, as the dimples are 3/32.Is there some way to create a 1/8 dimple with the skin attached?