Clovus,
I had the exact same problem with my micro at first... It was all over the place... Then I kinda figured it out... It wasn't me, and it wasn't my expo settings... True I was so used to the nitro which had much quicker cyclic response, but I played around with the expo and it really didn't help much.. POSITIVE expo actually seem to help a little (making it MORE sensitive around neutral) But too much and I lost it...

THEN! It hit me.. I was only attacking half the problem... What I was experiencing was my stick movements being too "slow"... Because it took so much stick movement to put in a correction, but the time I GOT the stick where it needed to be, the heli had already shifted and needed something different... Positive expo helped, cause it made it require less stick movement, but then it got VERY sensitive around mid-stick... So too much blew it.... What I did afterwards made a TREMENDOUS difference... Give it a try.... Go into the Swash AFR menu (assuming futaba.. not sure what JR calls it) and crank the elevator and aileron mixes up a bit more (to give more movement)... THEN go into your dual rates menu and set the rate to 140 - 150%.... Then set a bit of NEGATIVE expo.... Maybe around 5 or 10%... Give that a try... what you'll find is that your neutral is still "easy", but when you have to enter corrections it can be done quickly and with little stick movement... It made a WORLD of difference for me.. Things almost as stable as my nitro now...