Aha, one of the Orange Stacker owners. That amp seems to have traveled around some. One of the few living Stackers. The LG is better and more stable in every respect, but I believe that the sound dynamics are the same or better.
Unfortunately the wiring didn't hold up in it, so it is in pieces in a box atm, along with a bunch of Stacker II parts. I have been lazy resurrecting it. At the moment I'm using one of dbel84's other builds. IMO if you have improved upon the Stacker II I reckon that will be a good thing as with my Sony XBA3 IEMs, which have a really off-the-wall impedance curve, the Stacker II doesn't sound right. It is true to its design of sounding like the tubes though.