Kenmore cleaning and Mods?

I got the Kenmore base model (water distiller) and did my first run
this weekend.  I ran an 8 year old Zinfindel wine through twice and
ended up with with ~67% abv product.  I dillited to ~40% and ran
through a Brita twice (I noticed the filter is no good for water now) 
and got a decent, slightly sweet tasting, alcohol.  I am aging with
toasted oak chips to mellow.

I have a couple of questions though... One is how to clean the
internal portions (condenser) of the unit.  I immedately ran the unit
2x with water after my runs, and I can clean the heating vessel fairly
easily.  The water tastes "funny" though.  It has a feint sweet taste
similar to the alcohol.  Is there a way to clean the condenser?

One (unrelated) mod to the unit I was considering is adding some
copper to the vapor path some how to reduce sulphor output.  I was
thinking of adding a copper scrubber and/or a copper tube to the
flexible plastic tube that connects to the condenser.  Any thoughts?

I noticed that someone is [planning] to sell re-sell modified kenmore
units as small alcohol stills:
http://www.brew-usa.com/mini%20distiller.htm

I don't know what he's specifically done (other than his filtration
method) to modify the units but am curious and also wondering about
his claim "It is very easy to burn yourself or damage this system if
you haven't tested it the way I have." ?

Thanks.

-m