Phil - I can report my Grin setup as follows.
SMOS
Mining to F2Pool
Withdraw to Bitmesh
Sell at Bitmesh for BTC
Withdraw BTC to BTC Wallet.
I was pleasantly pleased with F2Pool -> Bitmesh. Selling at Bitmesh was painless. BTC withdraw was painless.
I also use Bitmesh - most convenient so far compared to all other exchanges.
I am using bminer in SMOS mining to f2pool.
4 rigs, consisting of (3+5+6) x 1080ti and 7 x 1070ti = pushing around 130 gps
bminer doesnt support c31 at the moment
I can push the 1080tis higher up to +20% more using c31
Which miner in SMOS best for c31?