I know the rule for a board UNDER your bipod for F T/R is no more than 2in wider than the bipod and no more than 12 in long (from front to back), but I am wondering if it would be legal to attach a 1x1x 18" piece of wood to my shooting mat so that I can push the feet of my bipod foreward into it andconsistantly preload my bipod. I use a Sinclair tactical bipod with rubber feet. This bipod need to be preloaded to track well. Thanks for the help!