The big disclosure? Ha ha... I hope you didn't loose any sleep over it!
I haven't heard from
@JohnnyGoo yet. But this is what I'm currently obsessing over: Your '65 SG Junior and one of Goo's PGK Juniors are both set up with Dogear P90s. My PGK Junior was designed for a Dogear, but I installed a Soapbar instead. When I adjusted the height of the Soapbar to where I like it, which is pretty close to the strings, I noticed that it really sticks out. When I look at pics of yours or any other vintage Juniors, the height of the Dogears seems to be half of what my Soapbar looks like.
You've stated that the distance between your Junior's body and the low E string at the leading edge of the bridge is about 17mm (I hope you were measuring at the bottom of the string). My Junior measures at 18.5mm, or .73". Not a whole lot of difference, right?
The string action on mine is low at 3/64"; low E @ 12th fret. Pickup height from the low E to the pole piece is 1/16". What's the pickup distance on yours?
All this leads me to believe that neck angle on my PGK Junior is a bit steeper than a vintage Junior. I wish it wasn't. What can I do about it? Nothing... unless I want to reset the neck. That ain't going to happen. I was wondering if Goo's PGK Junior has the same neck angle as mine...