Ok, found the part number for the trimmer capacitor – 1816267 and I can send one off to you.

For removing the two nuts holding the cap in place and the end piece that the tune rod fits in.

The best I do is to loosen it and the I used two exacto knife blades to unscrew them both. 
Yes there is very little room for any kind of wrench.

For soldering anything below the white ceramic and you can use standard 60/40 solder