Hi Kosst
That's more than likely why. The 3400 doesn't have any bigger caps. I went down to the shop just a few moments ago and looked at a circuit board close up and didn't find any residue. I'm going to have the guys check as well, we're pretty picky about cleaning up boards and parts.
Thanks for the heads up! One thing I love about the biz is, there's always folks out there discovering something useful to add to the mix.
Michael Green
www.michaelgreenaudio.net