I have an Aster C&S Mogul, newly assembled from kit (so something may be out of kilter). I cannot get it to fire up. I can occasionally, with a lot of luck and with the gas valves turned right down, get the fire to pop back into the firetube, but it won't stay lit. I understand this engine has a bit of a reputation (See for example the thread on "Are Aster engines finicky?" in this forum in February 2008.) I have read the articles in SitG 63 and 65 (I do not have the issues earlier than 58.), but if anybody can suggest a solution that does not involve physically rebuilding the engine, I shall be very grateful.