I started building my Napoleonic French miniatures

They're mostly a single piece with a separate backpack, although a couple on each sprue have separate arms and a separate piece tgat they stand on (it's not the proper base, more like a little baseplate which gives them more surface area to attach to the actual base). Unfortunately the 25mm square bases I want to use for are unavailable - the plan is to base them like a Warhammer The Old World army with movement trays and have them ranked up. I do need to check how many come in the box though, so I can figure out just how big movement trays would need to be. I wonder if I could make them so they can all fit together somehow...