Look at this info on a P365 that has a similar step:pearsoninfo.net/365/notes.htmI am not sure of the configuration of the 323 step but I imagine it's similar. And you may have a situtation where you have some bad corosion in the bottom 1" of the aluminum mast. The metalmast replacemnet can be made to a height so the corroded part of the mast can be cut away. To make the step you cut off the bad part of the mast base, send it to metalmast along with the step and they make the replacement to fit accounting for what you cut off. You will need more than a few days for this process. That's one solution. Dan Pfeiffer