Thanks for your informative reply Crashlessons. I've done a thorough search and found many sites refering to jacks book (very interesting reading). However, I was unable to find any specific plans for the cracking plant. I feel if Henry Ford was able to build one in the 30's, I reckon I could knock one up now, just need the know how. It appears that hemp is the prefered biomass to use, but for obvious reasons that's not possible. My aim is to save money by making my own ( I'm a disabled pensioner) and if I grew the hemp, I wouldn't have to worry about the cost of methanol. Anyway, thanks again for your insights and if you do manage to come across a site with plans please drop me a line. Regards, John.