I purchased this template because I have serious space limitations and needed a small setup. What I don't understand, and hence the low rating, is why they machined this template to require a 2 7/8" x 4" x 18" piece of wood to mount it to. While the 18" and 4" sides are not as important, the 2 7/8 side is imperative for the correct function of the template, yet that dimension of wood, or combination of wood, is unavailable as far as I have found. Given my modest wood working setup, I do not have the tools to fashion the needed block out of a tree trunk, so several months later I have still not been able to use this product. MLCS customer service was less then helpful when I inquired how they produced the block in their website's instructional video. Thanks for nothing, I have a $50 piece of machined aluminum collecting dust in my shed.