Finally called Drill Doctor to see if my particular DD500C machine was part of the replacement campaign I had read about right here on RCM (swelling plastic)... Talked to Denise, and she indicated the number on my unit did indeed qualify for replacement. She also said the free replacement will be expiring in about 30 days. After that, there are some costs for the replacement on effect models (500 and 750).
She handled my inquiry with care and expedition. I am excited once again about trying the Drill Doctor, because it could not be more useless than the first one, which led to me contemplating finding a new hobby after my constant failure as a drill sharpener.
Anyways, thought I would pass that on to any other procrastinators, such as myself.
RB