Hello Tom and welcome. I'm mainly into ancient traction engines but have made radio controlled and static boats, first model was a model ships cannon and then stationary steam engine, a vacuum engine followed by the Marshall Road Roller in 3 inch and then the Fowell-Box engine also in 3 inch.
Then came a succession of pre-war Austin Sevens and currently a Burrell-Boydell Road locomotive in 1 1/2" inch.
There are other projected projects thought about but I need to live until I'm about 300 years to stand a chance of finishing them all, but I'm having fun nevertheless!
Brian.