I spent the evening setting up the form block to hammer the flanges for the second set of 23 nose ribs last night. Not much too it. I had already routed the radius of the formblock. All that really needed to be done was flip it over and put the backer form block on the other side. Easy right?
As I put the first blank in and started tightening the bolts to hold the rib in place whilst I hammered. The darn bolts kept spinning, and wouldn't tighten up.
I'll fix that.
I took a hammer and gave the bolt heads a few good whacks to set them into the formblock a bit. When they didn't move much initially, I gave them a few really good whacks until they set deep enough into the wood.
I reasoned that it would let me tighten the bolts without needing a wrench on both ends.
What I forgot about was the drill bushings that were in the formblock. By hammering the bolt head and sinking it into the wood of the form block. I had inadvertantly driven the drill bushings into the rib.
The result was some nicely flanged 1/4 inch holes.
CJ
Screw-ups are part of the territory. But those pies are the reason you're not building an RV. 
I know I have several of them. 
