If you are going to bother to invest all this time and money, why do something everyone else is already doing? I personally have no interest in yet another round action with a single stack magazine, it's been done a hundred times.
As far as receiver design goes the wide flat bottomed actions of PGW and AI just make more sense to me, they have a wide, flat, even surface for bedding. PGW's design has multiple recoil lugs compared to the run of the mill stuff out there, it's solid as hell. AI uses four action screws and glues/bonds the receiver to the chassis permanently, bomb proof, no bedding. In addition to all this AI also uses dual stack mags which do not hang way down below the rifle but still hold 10 rounds.
And then there is the Win style bolt mounted safety, both of these rifles have it yet almost every custom out there uses that god awful rem trigger safety.
Neither of these two rifles cost 10 grand either. I already own an AIAW and if I ever need another rifle I will buy a PGW because like AI, their receiver design is way ahead of all the others who are still copying the rem 700 concept.
The only thing that has come out in the custom rifle action field lately that's actually new is the GAP Tempest, a 60 degree 3 lug bolt and uses double stack AW mags, nicely done GAP.