SLC,I did not epoxy the tail,however one of the alignment dowels came loose and vibrated itself into the stab causing quite an interesting flight,I got it down safely though.I checked them before assembly and meant to glue them just in case,but you know how that goes!!Sounds like your reciever is pretty close to the ignition?What prop do you use on the 2.4?I have tried a pro Zinger 20-8 and a regular Zinger20-8,the Pro had about 600 more RPM,but less pull,I just picked up an APC 20-8,to try this weekend,should have some pics,after this weekend,will post them when I get them.