I still use 72mhz and nimh on my glow planes and spectrum dsm2 on my gassers which use A123 on the controls and nimh on ignition.... yeah, I just found out slimline went out of business too... sorry to hear about Hayes.... they had some really great products... I guess I better take really good care of what I have, because the old school companies are disappearing.... I don't even want to think about it too much... alot has changed in the 4 years I was out of the hobby..... its all my girlfriends fault... she bought me a micro drone quad, then her 13 year old son showed an interest in my planes, so one thing led to another and now I'm back, just not in full force