Thanks for your concern Pat i have been running these gassers for 15 years so i know about the safety issues for sure , but you can never be to causious. I will flying the fox today on my Sig Suk and the Brison on the Texas Hurricane , so anyway i agree on what you said about the differences in ign> I might possibly send my fox to Gary at Brison and have him install the manual ign back on the Fox, i could have ordered it that way to begin with but chose not to. There is a difference. Anyway thanks again. Bruce