I created a remix of threadstones 4-in-1 adapter piece, so it fits perfectly to the P1S without the side spool holder.
The concept & geometry of the adapter was already perfect!
I added a M3 threaded insert (see pictures) to screw Bambulabs 4-in-1 adapter on it.
The author remixed this model.
I changed the original design so it fits perfectly to the P1S without the side spool holder.