^^^ this right here, and I did the same. @Jimbee helped me out.I borrowed tools from this thread and just paid cost of shipping. Great sharing of resources from the generous community on here. I also rented headspace gauges from 4D for like $15 to make sure I was headspaced correctly.
https://rokslide.com/forums/threads/tikka-barrel-removal-and-install-tool-swap-thread.311388/