Yeah, it's fairly touchy out of the box. Some things that can help:

Remove the ratcheting from the left stick in the Tx. Pop the cover off and slip a piece of fuel tubing over the little metal "tab" on the throttle gimbal. That'll help a bit.

Make sure your head isn't binding anywhere. A lot of people (myself included) had a minor binding issue in the head - in my case the blade grips/featering spindle - that needed to be addressed and resolved. Take a look at bdavison's CP build guide, particularly the posts on building up the head.

Set up your pitch curves properly. Again, reference the CP build thread..

Setup is everything. Get the setup done right and the helo will behave better.

A lot of people have installed a single conversion crystal in the 4-in-1's receiver and used their computer radios with their CPs. I'm expecting my crystal in the mail today and will be using my Futaba 9CHP to "drive" my Blade. Lots of Futaba solutions, I'm not sure about JR/Hitec etc tho...

Good luck!