Makes sense if looking at future multi-pump. I was just curious if you had run into issues (since you show parts for upgrading the EKP.) I'm running a Z4, where multi-pump is a PITA ... and with a POD and 535 I'm expecting it to be smooth sailing, given the amperage chart for the 535.More headroom, easily wired for more pumps. Set and forget basically.
Even though you can cool the ekp3 you will never get stranded with a bmp4 no matter what you run of it.