Hi Guys, I have picked up an Alco Featherweight petrol accumulator charging set which I believe was used by the RAF during ww2.The engine is an early JAP 3 overhead valve unit - not the later side valve. I am now after a workshop type manual for this unit - I have checked the manual section of this site and neither the JAP Model 3 manual nor the JAP Mark 111 Types 2 & 8 manuals are the correct ones. Could someone kindly let me know which manual I need and where I can obtain one from - thank you. I have a copy of the Working Instructions and list of Spare Parts which will be a great help when I actualy get to operate the unit but doesn't help in a strip down and retiming for example. Any help or advice would be much appreciated. Thank you. All the best, Kev.