Steam Build Feedback Request

[GrdnVrtyDstllr]

Hi Everyone,

I've been distilling for a 10 months on a 20litre NZ-made pot still and have had a lot of success. I've been fermenting on-grain, and pressing using a mop-press, and would like to have the option to strip bourbon wash on-grain using steam. I came by a great 100l vessel that happened to have a lot of 1" and 4" ferrules, and before I assemble everything, I hope I could get some feedback on the attached image.

Steam-Still-1small.jpg

Build plan:
2 10AMP elements going into the keg (RCD @ wall using the stove outlet).
Steam goes from (A) into (B) (2"), which reduces to 1" at (C), and through the Steam Wand (D).
I've left a 2" port for a Manometer/Pressure Relief Valve directly above (C).
4" diameter riser to a stupidly large shotgun condenser I inherited.
I'll make copper washers wrapped in PTFE tape in lieu of silicone (a strategy suggested by corene1 *I think*)

Questions:
1. Safety - Anything glaring I'm missing in terms of safety?
2. I've read about steam hammering on this forum, and am wondering if this is something I should try to engineer for? I was considering some sort of poppet valve that would be like a spring-loaded vacuum relief valve at the "manometer arrow" in the image, but have also read that introducing oxygen into the boiler is also possibly dangerous.
3. Are there any other pictures that would allow for better feedback?
4. Is there enough copper contact? Any suggestions for how you would add more if it's not enough? I have a lot of junk copper lying around.

Thank you everyone for your advice.

GVD