great info bill !thanx alot.i just purchased one of these engines online tonight and should have it by weeks end.i had just never heard of this make before,but the engine is new and comes with pipe as well..price on it was $58canadian which is about $45us so i couldnt refuse.the one i purchased is the hb40. could you please tell me what kinda power output it would have,would it be like most 40's..i'm just curious as to what the specs are i guess as i love this type of info..also what fuel would be best?do they like a low percentage of nitro like rossi or mvvs?thanx alot for your time.