I have a Les Baer Super Varmit in 6.5 Grendel. heavy 20" barrel. I would like to get the barrel threaded to except my omega can. I know a very competent machinist that can do the threading. I have all of the tools to remove and install barrels on ar15 platform, re torque barrel nut align gas tube and such. Is there anything I need to be aware of to keep the excellent accuracy this rifle has?