This is looking great! I tried to find some photos of the remaining sea chests but could not - there are only two now, in engineering, the minesweeping generators having been removed in the 1970's. We use one or the other at a time while underway, alternating each voyage. The rudder has evidence of having zincs at one point, but does not now due to electrical survey & tuning.
Your stern frame is beautiful. One detail that may interest you is that throughout the surface grain of the sternfram support, there are tiny pegs, perhaps about 3/16" in diameter, hammered into the grain. I assume this was done to tightened up the grain. I'd never seen that before on other wood hulls.
Please let me know if I can provide any more pictures. I love having been a little helpful with this build and hope to be of greater use.