The other day when I punched my new "Artic Fox", not only did I destroy the cowl and nose block, I bent the spray bar of the B-40 engine. Had a tough time getting it out of the case/venturi. Of course the needle itself was broken off flush with the spray bar. Went to Brodak site and it states they are sold out. So I had a Super Tigre Needle Valve Assembly laying on the bench. The hole is just a littleoff center, but, I don't think it is off that much. It fits the engine with the exception of the spray bar hole. Still need to bench run it. DOC Holliday