I had just finished restoring my 1948 Mamod Minor II with an abundance of help from "Alan UK" I needed to fabricate a cylinder assembly, safety valve & 2 wick burner, Alan helped me with the dimensions on all those items & I knocked them out to what you see here. it came together very well & started running at 8 psi & is now down to around 3 psi before stalling, for a single acting cylinder I am happy with that. I have over 20 hrs labor in this engine & asking $200 + 15.00 (USA) shipping ,it's hardly been fired since.