I've owned two of the Chamberlain units (I think both were Chamberlain, one
definitely was). Second unit made it for about 4 years (balanced door, but
pretty large), first unit did 6 or 7, I think it was. If you go for repair
I'd get a decent worm and worm wheel from Boston Gear or somebody. I went
replace with decent unit, the second time.

Adam Smith
Midland, ON
wrote in message
oups.com...
I can lift and lower it with no strain. I think it is balanced. I have
had no problems. This gear lasted 7 years.