Using the LBM to do a T was a challenge. A lot of bushings for 1" bar. My LBM came with a lot of bits so found a couple that are short enough to use. I made a fixture to locate off the cam shaft like KR500. For the vertical setting I use the A fixture with bushings. I set the bits with a Kwik Way micrometer that I calibrated to the 1" bar. Works but take a lot of thinking before I do the finish cuts.
T's aren't much fun since it takes so much to set it up. Everything is small. I've done the mains on over 200 A's and have had fun doing them.
As far as cost of the LBM, I bought mine at an Auction in 2002. It was almost the last thing auctioned in the building. Seems everyone had gone outside. They started at $300 and kept going down because couldn't get a bid. When it got to $50 I bid and bought it. I call that luck but it did find a good home.
I have never used it for main inserts but did use it to machine for cam bearings.