[Boatanchors] RME-45 Receiver- Information?

[David Stinson]

I just acquired a very cool-looking RME-45 receiver
for a very affordable price.
This is the "late" -45 with the VR-150 and the calibrated
bandspread, not the 45B.  I have the SAMS
and the Google-available information.  
Here's some photos:
https://goo.gl/photos/VUCFDvCcEWUKJsNb9

Looking for more info:

1.  What is the speaker impedance?

2.  What is the pin-out of the octal socket on the
     left side of the chassis rear (not in the available
     information)?  Does it need "muting" jumper?

3.  Are the fixed capacitors in the IF transformers 
     commonly bad?

4.  Do the IF tuning capacitors have "press fit" collars 
     that crack like those in TCS?

5.  Any common failures like the AVC to B+ leaks in 
     Nationals and TCS?

6.  Anyone ever install a temp. compensation cap
     on the Osc section like is done in HROs?

7.  Any other "hints and kinks?"

TNX OM DE Dave AB5S