shorthair--it was tooo cool though when i tried to fire mine--and before it fired--there was tooo much wmo in the chamber--and when it lit off--it went ballastic--sheared the ip shaft!!!!!!!!!!!!!!!! damn----------good thing had spare pump--------------if the shaft hadnt sheared--probably would have blown!!!!!you found out too i goofed on one tank got er to lite with a little ether since then 70% above 50* 50% below. mine is filtered to 2 microns & runs thru a water seperator at the same time then pumped into the tank.