Carry the parts in the LPK separately as well. When I did my second AR I bought them all separate since I was doing a different grip, trigger, Bolt release than what comes in an LPK and didn't need yet another set of spare parts.
May want to look at carrying the tools needed (punches, magblocks, wrenches).
Can never go wrong with Magpul stuff in general
Would be nice to have a second distributor for all of Geissele products if possible...