I have a tail mounted servo, and it hasn't made the tail heavy situation any worse...

Perhaps coz I have a 1400mah Sub-C battery up front..

I am gradually upgrading some of the sloppy bits, added a quick swash and radius arm/washout driver (had to grind down the radius arm pin as it was too long, foulded the swash at full pitch)

Also added the swash anti-rotation arm....

Had to change a lot of trims after that, it was soo much more precise to fly...