Thanks again, GOC
The next day it dawned on me, that it's as simple as hitting PAUSE and CHANGE FILAMENT, which lowers the build plate. It's not exact, but just going by the % of the print done, it was good enough for what I wanted to do.
I checked your Blog, some good tips.
On the use of painters tape, as you probably know there are two or three grades as far as how long it can be left on before it takes finish off. I don't know if another grade might work better. For 3M Brand see- http://www.scotchblue.com/wps/portal...esources/Five/
Frog has a couple as well.
Happy New Year