Here's my idea for an unconventional RIMS.
I have a 20 Gallon Stainless kettle for a mash tun along with home made false bottom. Put a ULWD element as low as possible in the tun and elevate my false bottom so that it clears by extending the stainless bolts I currently use for feet on the false bottom.
I already use a pump and recirculate, but really only to clarify before batch sparging into my kettle. So, I'll build a distribution manifold to recirculate back onto the top of the mash.
Then add a PID and SSR to cycle the element and do continuous recirculation.
First question: Crazy? Probably, but it seems simpler than a separate RIMS tube and cheaper.
Second question: I suspect I'll need to put the temp sensor low in the kettle as well with the element but not too close? What're your thoughts?
I'm interested in your comments as I think it's a way to simplify the system and save some money.