hi im finding it hard Turning the wheels on the bend could it be because i have dirt in it or i do i need a new sevo or can u make them looser thanks

Check the servo saver, be sure its not binding or gripping on anything. I had a similar problem last week and found it was the adjustment screw rubbing on the chassis causing the resistance. I tightened it up some and all was good again.

Some servo horns rub on the top of the servo around where it bolts down, you may need to trim the servo horn around the bottom where the splines are...