Been following your build with great interest. A question about tube expanders. I purchased one used by a/c - refrigeration mechanics for making tube to tube splices etc. without fittings. It uses a hand operated hydraulic pump with tubing adapters for sizes 3/8" to 1-1/2". The price was not prohibitive. Am I wrong in thinking that this tool would do the trick for model boiler builders?
Keep up the great work,
Gene
Keep up the great work,
Gene