Mark,
Something tells me you have effectively "won lotto" with your choice of Club, and choice of custom Gunsmith
You are off to a pretty good start.
I recommend that you sit down with Matt long enough to talk to him about what your needs and wants are, because I am 100% certain that if he fully understands what you need, or what you think you want, then what he recommends and then builds will be the ducks guts. What you have right there in your own Club is a man who is as good a gunsmith as anyone in the country, but is also one of the best performed F Class shooters in the country . (I wish Alan had a pocket-pissing smilie that I could use
) He can "walk the walk".
When I had my first serious "custom rifle " built, I thought I knew what I wanted, and had enough confidence to import my own action, buy the barrel, stock, scope, mounts and trigger etc.
Then when I picked it up I discovered F Class....
I often look back that 4 years now, and wish that I had had Matt at my Club, so that I could sponge up that information that probably took him 25-30 years or more to acquire as he won Queens after Queens.
Stock was wrong, worlds best Mil Dot sniper scope was wrong.......calibre worked out to 6-700 yds but not to 1000.........,should have got Left Bolt Right Port, instead of fully LH.
My only "advice" as such would be that whatever you and Matt decide on, to get him to build it right up near maximum weight, and that way recoil will never be an issue for you......oh and consider a Bartlein barrel !
