I extended the side hanging hooks after trying different side spool holders including the Filler Pegboard mount and it having more deflection on the pegboard than I was comfortable with.

I liked the below model with the support down to the lower rail on the P1P but the hooks were designed for stock P1P. I extended the hook to fit snuggly over the top to be able to hang this with the pegboard shell installed. I may look into hybridizing these for pegboard later. Still learning.

Bambu Lab P1P Side Mounted Spool Holder (Remix) by sonnyc | Download free STL model | Printables.com