I am impressed! You’ve certainly gotten the most out of that combination and in a heavily wooded, high humidity area with an antenna lower than the canopy.
The use of the amplifier is something I haven’t seen others do; good job!
The 200 mile range mentioned by wrxp381 is highly unusual except between high elevations and across deserts, which bear no resemblance to your swamp at sea level.
As long as you’re epoxying the radome, you might consider drilling and epoxying (or screwing) in some pins to prevent the halves from separating.
I would not worry about tuning that antenna. You’ll truly never notice the difference between a VSWR of 1.5:1 and 1.3:1.
As you know, your feedline is attenuating quite a bit of signal though and in both directions. That’s your most easily identifiable avenue to getting more power, but it could also be expensive.
Again, I’m impressed!