Hi - Have had the yrg for just a little while, and while trying to "tweak" it in found that the D string was not tracking as well as the others, even after adjusting settings such as string tension,software items. Before I ran accross this topic,being experimental, I found that if I wedged a small bit of "foam" such as that found in protective cases, just between the "pickup" and the neck side of the cavity,(seems to keep the pickup from "drifting" ) tracking balanced out for the D string without adding other artifacts such as drastic volume changes or similar things. I'm gong to experiment more with this idea later as I become more familiar with this instrument and as necessity requires. But for now I can Ditto prz's findings in general.
O.K. I've been "tweaking" again and have been very happy with the results! I've found, building on prz's suggestion, that a strip of VELCRO works great for "balancing" the strings. I've placed a strip of VELCRO (The "soft fuzzy side) across all six strings right above the pickups and then replaced the pickup cover. I did NOT remove the paper backing and actually stick the Velcro to the pickup cover!!! I then mde shure the pickups were "seated" towards the tailpiece. VERY GENTLY pushing them towards the tailpiece and then making shure they were all horizontal with the strings. The Velcro strip seems to just be enough to keep the pickups from "drifting" out of place, and stabilizes the reaction of the pickups to the strings without applying undo pressure. I have used a pick and finger picked with MUCH more accuracy than before this little MOD. I am a "light" player- I use a thin pick and a genter touch while finger picking-so rsults may vary, but I feel with a little more understanding and a bit more "tweaking" of the strings/software, the yrg will be one amazing piece of gear that I can use in the real world. If anyone else tries this-please post your results to compare notes and maybe improve a bit more.
Another side note- This company has been nothing short of great (and fast) in responding to my questions so far. It is hard these days to actually find a company that DOES care about thier products-quite refreshing!!!