Hey Trever, I know the 075 is a beefy saw, but you might want to consider swapping out the hard tip for a sprocket nose. Milling is pretty straining on the saws, especially if you were to use most of that 42" bar, and every little bit of help counts. The sprocket nose will decrease the work that the chainsaw has to do and let it put its energy into the wood instead.
Sounds like you already have the bar though, so if you're using it in wide stuff, take your time and go slow.
Good luck!
--Tyler