Looks like you're making good progress, Rich!
On the coil - if you're tuned on 75M (looking at the picture) you might need to tap the coil for less turns and add more C1 and C2. (plate tuning and loading) This will increase the Q. It might produce a better match to the tube plates too, so worth a try to experiment and watch the relative power output efficiency amongst different taps..
I realize space is tight in that amp, but the next one you build, try to position the coil so that if has at least one diameter's free space around it. Otherwise anything metal will couple into the field and reduce the coil's Q.
Also, keep an eye on that plate coupling cap - it might not make it for long. I had a 20kv plate coupling cap PARTIALLY crap out on me the other day. Was a bitch to find. Intermitantly, I would key up and the HV supply would blow all the fuses. I thought the tube was arcing internally. I put another cap in and it happened again. I finally substituted in a new coupling cap (last resort) and it worked. The bad cap passed the hipot test for DC, but with RF, it shorts. So, remember these symptoms if this happens to you.
** BTW, the path for the DC short was thru the coupling cap, into my SAFETY RF choke to ground. Without that safety choke, I would have hot DC sitting on the antenna lead with nothing to do but wait...
There's an example where that choke finally did its job, several times, in fact.
Other than that, as long as you get good power out with no arcing, it's time to paint if blue and ship it!
T