Nice. I started using CHEP's hyperfast printing profile on my ender3 for non critical, functional parts that don't need to be pretty and it cut the time by about 2/3rds for most stuff.Yes, klipper on a Ender3 with a Raspi 2 doing the serving.
I find that I can print considerably faster. Presently limited by cooling capacity, only 1 4020 fan. Will print a new manifold that mounts 2 4020's, then should be able to print faster again.
The other huge benfit is being able to change parameters without recompiling Marlin.
Moonraker etc are on the Raspi. Great documentation. It does IMO require going through Teaching Tech's process to tune to best effect.
Just found out about the Creality Sonic Pad as well. Sounds like it will work on most of the Creality line and is around 200 bucks and runs Klipper.Makerbase also has a board that uses there own version of a pi...or you can use there pi on its own, mk pi, I believe
Plenty of of pi alternatives