OK guys, here's the revised interface, tested and working (for me):
Note, the transistor is now a 2N3904 NPN. There's also a few more components, hopefully there won't be as many problems with this design. Should be pretty easy to build, I just modified my other interface. So who is brave enough to be the first one to try it?
One other note: I changed the "remote display tricker" resistor to a 3.6K, which I think is the actual value. If you've been using a 4K, it should still be fine as long as it turns the V1 display off.
If someone gets this working, let me know and I'll update my webpage with the new schematic.