Great news. judging by the room available for the punch, you could have stuffed enough powder in there to shoot it out quite easily. However, your way worked very well and did it without causing the stress that you eluded to. Great job. BTW, Brent's suggestion of bedding the blocks is a good one and one that I had forgotten about. Its been a lot of years since I have done such work and my memory is not what it used to be......and it never used to be that good even then.