Did a full drivetrain upgrade on my e‑fatbike, since the original 10‑speed 11–36 cassette was completely inadequate for a bike this heavy that’s meant for off‑road use. Swapped it out for an 11‑speed 11–51 cassette, along with a new derailleur, chain, shifter, cable, and housing.
At this point, brakes remain the only component I haven’t installed myself - though that’ll probably change soon, because these SRAM Level brakes are total trash.
I got inspired by this post and decided finally to pull the trigger on my attempt at replacing my derailleur. It took a while, but I got it done and in the end I was surprised how well it went. Thanks OP!