Guest Scrufie, I read your comments with great interest as some apply equaly to playing other instruments - I have a habit os slowing down and speeding up depending on the difficulty of the section of the tune
Also an accordion player at one of my local pubs drives the mandolin player to distraction with his timing, he insists on putting as much ornamentation in to his playing as possible even though it throws the timing and the tune to the wall

Roger