I have a 58XL for use on my Canham DLC. I have a bag bellows & recessed board.
If you are shooting 4x5 you can probably get away without the recessed board because you have barely enough coverage for the format, and therefore don’t need movements.
If you are shooting a Rollfilm back (my main use for this lens) you have lots of coverage for movements. A super compressed bellows - even a bag bellows, will benefit from less compression when tensioned through movements. I don’t know how rigid the Chamonix is, but I fear my Canham standards could ‘flex’ if I use movements with a bellows greatly compressed. I have also found the 58mm and indeed the 65 & 72mm lenses quite unforgiving of any asymmetry between the standards. I often shoot buildings & streetscapes and uneven subject softness due to asymmetry is very obvious.
I currently have the 72XL on a flat board but I intend to move it to a recessed board.