brian,thanks for the SUPER FAST and informative help. i agree,the head does look like a k-1sb,i have one somewhere. did this heli come out before the gs alpha and baron alpha II?? if so,i am wondering why they went to the crown gear to drive the tail as it sheers off so easliy. eventually i plan to get away from the crown gear style.also, the two bevel gears that you mention,are they inside the tail drive unit?i think that i may have this unit on a baron 50 that i have., thanks,larry