I was wondering that since the 25r is a SS amp, then the reverb tank does not require a tube. Therefore, is there a circuit that I could add to a different amp that could add a 25r reverb tank? I came across this old thread https://www.tdpri.com/threads/frontman-25r-reverb-changeout.559158/. This thread talks about changing out the inexpensive 25r tank for a higher quality tank. This seems like exciting potential, but I have never dived into an amp yet, although I can build just about anything and have successfully modded pedals. Anyway, any light on this subject pro or con would be very appreciated. And yes, I am fully aware of the possibility of opening up a new rabbit hole of building my own amp, which I always envy others that do.