After getting inspired by oxtool and jkilroy on youtube, I finally got
around to making a set of plywood t-slot covers for my mill. I used a
piece of 11" prefinished drawer slide plywood from a local hardwood
dealer (about $8) and cut off two pieces. After that, I traced the
outside of my vise and cut the ends on my band saw. Finally I made some
5/8" delrin blocks that I screwed to the bottom of the wood. I placed
the outside pieces close to the end of the slot so that the covers won't
rattle around when in use.