had a RRE160 bust a mast tray bearing, called in the local registered BT service guys, they replaced it and its good again. However, now the altimeter doesn't give any readings and the lift speed is reduced if you try to go past the free lift portion of the triplex mast, also the transition between stages is horribly rough going up and down. SO, called them back and they 'checked it out' and they didn't know what the problem was so they took it away, brought it back a week later and said "oh it's supposed to have reduced lift speed at height" and your driver must have been dreaming about the lift speed (hes been driving it since new and has clocked up 7000h). I trust my driver, is there anything I can tell them to check out?