Hello everyone just joined and I hope this is the right section to ask this question in. My main hobby is playing with RC cars and recently I have gotten an itch to make one steam-powered and the one thing I am finding the hardest to build around is the boiler. At first, I was looking at a fire tube boiler design and recently found out about the monotube boiler design. Keep in mind I never build anything steam related but I would appreciate some input as to which boiler you guys would recommend, very limited in space to around 150mm in length, 50mm in width and height isn't limited so much as I can run the RC without a body. I could play with those dimensions slightly as I can always grind away some of the material of the chassis but not much.