It's interesting that you combined the two pianos for this. SOunds to me like it worked - it sounds like a single piano, no phasing issues. I'm wondering what your motivation for doing that was? Neither piano sounded sufficient to you on its own? The JABB piano is in WIDE stereo and often has to be tamed in that respect, I've found--otherwise it's always like the instrument is just inches away. The GPO piano doesn't have that stereo field - I think it's the stereo processing which makes people often prefer the JABB, but the GPO can actually sound more natural.