loop IV test modes?

[Bret <echoplex@yahoo.com>]

Kim, Matthias, et. al.

Recently, I needed to run the VCA DC offset trimmer test.  
I followed the archives listing: 
To get into the trimmer test, Start the unit while holding the
Parameter and Record buttons down. Keep them held while the startup
screen goes by, until the display shows all t's. Then let go. Should
say 7F. Press parameter so the "Keys" LED is lit, then press Insert to
start the trimmer test.  

This does not work as described, in Loop IV, so I put Loop III in the
edp and ran the test and set the trim pot.  It worked fine.

Is there a way to enter test modes in Loop IV? 
Are there other test modes that may be useful in Loop IV?
thanks,
bret

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