I agree Bruce, thanks for your response. I just can't find any way to take up the slack. I'll check to make sure, but I'm pretty sure the gears are turning. The confusing thing is the gears seem to be fine when near vertical. All I can figure is the arc must change for some reason as the blade moves so the gears move closer together near 90º.
I'm afraid I might have to take the top off to see if there is any adjustment from the top side. I think I'll watch a few more refurb videos and see if I can catch something I've missed.
The buttons that lock the wheel on the tilt are worn or damaged, because the wheel won't lock. To fix that, the top has to come off and the entire mechanism has to be removed. I used to love to do that type of thing, but old age has crept up on me and it's not fun anymore.
.................. John D....................