I has a YS 1.20 in my Excelleron and had one woodscrew back out of the mount ral about half way through the season. I fixed that by using brass threaded inserts and machine screws. If you aren't sure about T nuts then the theaded inserts are a good way to go. You can get them at a woodworkers store or online. Here is a link to the micro fastener page for them http://www.microfasteners.com/catalo...cts/NUTBTI.cfm