I can restock the gun myself, so all that involves is the blank and I have about a hundred to pick from. Time is mine to do as I want, after I retire. Other than the gun purchase price, the only out of pocket expense would be the re-case coloring. Turning down a set of chamber inserts, from 12/28 to 24/28 would be tricky, but not impossible. I think I even have a couple on hand. Reworking the extractor ought to be fairly straight forwards. I have a rim cutter for a 28 in my shop, unless I lent it out to someone. I have done that before and forgot who I lent it to.
24's were proofed at the same pressures as 28, so the barrels should easily handle the loads. From a technical stand point this project is fairly straight forwards. If the gun had 29.5" or longer barrels it would be more attractive to me. And I do not know what chokes it has. I think if it is open chokes, I am going to pass and if mod. and full I wont. 24 just does nothing for me as an odd gauge. The 32 does, for some reason, seem more interesting. I just do not want to end up with another gauge to deal with and I like this gun action. Sometimes you buy projects for the reason they seem interesting.