I don't know how long you were out doublea, but for the 10 years I was gone, EVERYTHING changed! Radio moved to 2.4 gHz, batteries went to LIPO, giant scale got way bigger, helis seem to be able to do so much more, builders kits are hard to find, and local hobby shops have all but gone extinct. Not all the changes are bad, but i got to learn some thing over again! Welcome back to the hobby.