Ah, sorry to hear. I was running 2 x XF280's for a good while and didn't like the cleaning maintenance when it came time to do that. Tear down and reassembly was always a chore just because of how fidgety it was to put back together. One of the XF280's started to show exposed wires on the block so I canned that one for spare parts and now use it for the remaining one. I added a 4k gyre and a wave engine le so I could control both. The 4k came with spare parts so now between the two I just do everything over the display, reset, then soak. So far it is working ok.
I hear you though. Sounds like you had a rougher time than I. The laminar flow is hard to beat. Using the maxspect controller getting a standing wave, left and right pulse pattern, was a joy. The wave engine LE is limited and I'm not able to get similar results.
Oh well - didn't mean to derail.