Here is my unit of cavalry artillery for the austrians. These are all Hat Industries' models, but from a couple kits. The guns and carriage are one, the crew is from another (the same I use for my foot batteries).
The cavalry artillery kit comes with 3 carriages, but I'll be using a single one per battery, to save space on the table. This leaves me with another 2 carriages to "convert" my foot batteries into cavalry ones when required, even though the guns there are not exactly accurate for the cavalry artillery.
All 3 guns come with removable seats, and because the detail underneath is so nice, with the ammunition and powder cartridges exposed, I chose to leave 2 of them open, putting the seats on the bases of the carriages, instead.
Here we see the 3 carriages: