So, I have an XLR chassis on order for my T/C .308 Venture and want to upgrade my glass. The action currently has the two piece Weaver mounts and I have been running a Vortex Crossfire (I know, entry level). So I want to upgrade to better glass (probably still Vortex) like a Viper HS or ELR . Should I put a 20 MOA one piece mount on as well if I want to get out to 800+ yards, and if so, is there a one piece mount that will fit onto the action without gunsmithing required?