Power heads

I am using Aqua Clear 802 power heads, they have been running constantly
since January 95. Recently I had to remove the armature because it had worn
so much that the vibration against the glass could be heard throught the
room. I have been able to repair the armature by filling the center hole
with epoxy and redrilling with #33 (.113") drill, however I don't know how
long it will last.

I am wondering if there is a better built power head available that has
bearings or ceramic in the armature instead of plastic.

Doug Bardell
Garson, Ontario, Canada