Way back when, I supported COL Gravis’ Kickstarter for Heavy Weapons and Carriages. Unfortunately there were only 10 carriages and a lot of different weapons. I used all the carriages for lascannons and was left nothing for the missile launchers. They are supposed to look like this.
I just discovered a workable solution that still fits the Victorian theme I want to keep. I utilized the tripod from Cadian Heavy Weapons and mounted the Missile Launcher Sled to it. The final conversion looks like this. The adjustment wheel is a little free standing but it gets the point across.
Here is what it looks like with a Heavy Weapons Crew. I think they look pretty good for a simple conversion. I plan to paint the rocket body one color but the nose another color. I will paint the rocket that is in the loader's hands same color as the nose. That way it looks like it plugs into a missile body. I am going to try to sculpt or mold some additional missiles without nose cones.