Not Horse & Musket era, but those from WW2, 3D printed as needed for RF Blitzkrieg Battlegroups. I would have used the HaT figures for WW1 but they are currently unobtainable at sensible prices.
There are some fragile parts, and I need to investigate some more flexible/robust resin before I use the printed for major production of figures. The sculpting is a bit crude, but passible for WW2 as there are far fewer details.
I also printed off some dismounted figures
Both the mounted and dismounted figures came unbased, so I learnt how to digitally add the bases before printing, which had the advantage I could print them the exact size and shape I wanted. The only downside was they warped slightly on curing/drying in the sun.
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I had printed 3D printed motorcycles combinations before, but I needed more to make up the maximum needed for the RF Blitzkrieg Battlegroups book. I also printed some nice solo motorcycles that were also available in the same file, here is the whole collection.
As before the MGs were very fragile