Better Idea
Chris,
Your question really struck a nerve with me as I have experience with both the Farley front rest and building and maintaining concrete bench tops.
Don't misunderstand; I love the Farley rest and would not part with mine, but the concrete nails on it are an abomonation!
Not only are they pure hell on bench tops but they also go right thru the holes in Superfeet. I won't let anyone use them as is on the bench top at the tunnel.
The fix is simple.
Replace them with 1/2 inch hex bolts that have been sharpened in the lathe to a ninety degree included angle. The hex should be tightened all the way down on the top of the base and the point should protrude from the bottom only enough to engage the holes of the Superfeet. It's the best setup I have ever seen.
"Oh,, but that won't provide for any leveling." you say.
Not a problem, I assure you. If you use Superfeet, Don Nielson's 'hockey pucks' or something similar, your rest will sit plenty level on the bench. If the rifle cants in the front rest you need to message the bag a little to level it up.
I'm on a crusade to stamp out bench bashers!
I would not want to see any more rules written, but I hope everyone will voluntarily start using some type of protector for the bench tops around the country. All you have to do to appreciate what a job it is to build them is try repairing or replacing those that have been battered by hardened pins and sledge hammers.
Please save those bench tops!
Hope this helps.
Later,
Gene Beggs