Version .41 was getting 18-19 sol/s on Vega 56's (144_5).

Also, I undervolted. Fully powered Vega 56's are getting:
Average speed (300s): 32.7 sol/s | 32.9 sol/s | 38.6 sol/s | 36.9 sol/s | 38.7 sol/s Total: 179.8 sol/s

Ignore the first two numbers - I had to undervolt my 64's as full watts swamped my ps. The last three are 56's, so it's averaging around 37-39 sol/s fully powered. Just don't want to spend an additional 60w per card to get another 3-5 sol/s

The fully powered (240w) Vega 64's (first two numbers) are giving me 41-43 sol/s:
Average speed (300s): 41.8 sol/s | 42.5 sol/s | 31.2 sol/s | 29.1 sol/s | 31.0 sol/s Total: 175.5 sol/s

Decent progress so far...