my 18W TMB design with couple of mods: VVR, heater elevation, dual rectifier

[andmarti1424]

Hello. This is my 18W TMB version base on Trinity TMB but with some mods:
* Channel switching with relay
* HI/LOW sensitivity switch for each channel
* VVR power scaling (just power amp)
* heater elevation
* Dual rectification

TMB_2020_3.png

Whats your opinion on ow the heater elevation and dual rectification is arranged?

I have a couple of other questions to anyone who can help..
Shall I drop voltage when using diode rectification? or its ok to leave it this way?
Can humdinger hum pot could be added in this design?

Any other suggestion is welcome!!
Thanks!