I haven't done business with him, but he does give it hell on youtube. Not to hi-jack, but is the 30+ watts from a 949/959 he shows regularly real?
Bell's is the #1 source for some useful info - IMO. Well; doesn't compare to the WWRF. Check out their tech library - useful stuff!
Yes, you can get ~30w from the newer 959's. That is because they have a single MOSFET IRF-520 final instead of the more expensive and rare 1969 final transistor. Out of the box they will do 12 watts; but they can be turned up. Better to run them no more than 25w if you don't want to keep replacing the final.