I'm working on a unit of 2eme Carabiniers for 1815. Based for RtE at 1:20, the ~414 men in three squadrons should be a 21 model unit, which I'm bulking to 24 (3 squadrons of for visual effect. I got sucked into this by purchasing some Foundry metal carabiniers off ebay. Given the expense of Foundry products, I'd like to finish off the unit with Perry plastics or metals, which give the same numbers for a good deal less.
Hence my question. How well can you mix the Foundry metal and Perry plastic French Carabiniers in the same unit?