Transel Dynamite 150 linear amplifier with the covers off, walkthru and help me out

Recently bought this on Epay. Another bad shipping job. It was 'double boxed' but the inner box had zero packing material between the amp and the box and between the inner box and outer box there was just a minimum of peanuts. That's it. When I picked the amp up, CRUNCH. I knew right then I was in trouble. I did a video of the unboxing of it. Now here is a follow up with the covers off and a walkthru.
Amp has 3 tubes, 6lq6's. 1 driving 2. As seen in the first video, when you see white in a tube, it's lost its vacuum. No vacuum, no workie. So at least one of the 3 tubes is definitely bad because of the bad packing job. It looks like the other 2 may have survived. Transel mounts the tubes on a circuit board and they are mounted horizontally. With no packing material to support the tubes, I'm surprised that any of the tubes survived. Experience has taught me, no matter how good you pack a tube amp, its best to take the tubes out and pack then individually. If not, at least put packing material around the tubes to support them. Over the decades, I have lost hundreds, maybe thousands learning that very lesson. BTW, with big heavy tube amps, I won't even ship anymore no matter what. I lost many thousands that way too, not to mention a bad check and a Paypal that got reversed for some more thousands.
Anyway, to get back on track, this amp looks like it has a similar build to the Transel Nitro 300a. Tubes on a circuit board, horizontally mounted, old metal can caps for the HV, 1 driving 2, common Pi output tank circuit. It's a PITA to get to and work on the circuit board, but my problem or question is: What is that Tune gizmo? It's near the load side of the output tank coil, though the coil has a load trim cap underneath. Also on the input side of the tank coil, where the Tune cap would normally be, I see component mounting holes, but no components. This tune gizmo looks plastic, and then the whats up with the ground wire coming up and goes to nowhere? I am very familiar with Gimmicks and Flappers in amps, but this one has got me. Any thoughts, help or pics?