Digital BW, The Print

I've just started some tests with Krystal Topkote in a 2200. I'm
overcoating on a second pass at the moment, and testing it on prints
made using the standard UC-PK/2200 inks and my K3/2200 inks. 

Because my first tests are quick and dirty, I happen to have the
Topkote in the LM slot. If I decide to continue using Topkote I might
move it to the Y slot. I did my first overcoating using IJC/OPM but I
had problems with OPM behaving strangely when only the LM slot was
used in the profile (I've never had that problem before) and OPM is
slow in comparison to the Epson driver in High Speed. So I decide to
use the Epson driver.

To get just the LM ink from the Epson driver, I used an untagged tiff
file and printed that without any colour management. I tried a number
of combinations and, not surprisingly, came up with 255, 126, 255 as
the nearest to only LM ink as far as I could tell. 

Any comments or advice? Has anyone else tried this stuff? I've yet to
get down to evaluating all the tests I've carried out so far, but my
first impressions are good, especially on glossy paper with the UC inks.

Thanks,
Helen