Mk3s - Einsy - Pi Zero : Making a Ratos Lite ?

Hi all,
I've been running Klipper/Mainsail on my bears for a while, on PI Zero on UART (not the pi 2 Zero) : The Einsy can't supply enough amps even for a Pi3A+ and, without any fancy stuff (cameras...), the Pi Zero does the job very well.
I wanted to update them to Ratos 2.0 for a better farm consistency.
The config is really tuned as I like it (great job !), but even the 32bit version looks too heavy ("timer too close" crashes).
Can I remove sections like crowsnest and other ressource intensive stuff via putty and do I guess removing sections from Moonraker ?
Thanks a lot in advance, I intend to spend the night on it !