http://kuvaton.com/k/yYqo.jpg Needs some paint...
Chassis is way too small! And there is inside transformer, 15H choke etc. Do not know is there any benefit to use tube rectifier, but it makes electric field and many 6SL7 tubes are rather sensitive to it. At least with tube rectifier amp does not seem to sound worse than with diodes.
Amp uses AC heaters without any problem.
I've been looking to upgrade to the LD MK VI+ vs the WA22 and a lot of poeple said you lose some power with a tube rectifier which is a downfall if you're going to orthos like I plan to, but if you're using something high impedance in an OTL topology its up in the air whether its better or worse for SQ.