The only WGS speakers I have are the ET65's in a 2 x 12" Mesa cabinet I like them big improvement over the stock vintage 30's
Most of my amps are Dumble based and the best is EVM12-S 300 watt then EVM-12-L 200 watt Next is Fane 12L the Fane cuts some of the high frequency
I have not tried the WGS 12-L it looks good.
I like inflate sustain clean and overdrive where the notes bloom and take off some call it note flipping.
You can't get that from china made resistors but you can with NOS Piher resistors. That's what Marshall used in their glory days.
Same with transformers new power transformers are OK but I only use seasoned OPT in my builds.
I've only serviced thousands of guitar amps since 1973 what do I know. I feel honored that I built two amps for my favorite guitarist in the world they cost $15,000.00 in parts.
Robert if I were you I would try to contact Billy Zoom in LA I know he is ill but he is a master amp tech.