Indeed a great camper, and very nice mods :-) I've got S/N 002 of the model line, also via Bill in NH-- got it Feb 2015. Bill has a lot of DNA in your unit, going back a good ten years. The missing stick storage, resized genny compartment with commercial slide, extra seat cushion, switched rear-view camera, and storage above the compressor refrig are all after mine was built. Same re the height of the microwave and shelving, although I believe my 5'4" wife gets credit for that mod-- two inches lower in yours than mine. If you have a 120VAC outlet at the rear shelf, that was also on Bill's list (and mine to do as a mod). The swing-up seat was another customer's suggestion and Bill ran with it for the last several he ordered; I got one from Rex and just installed it a couple of weeks ago.
As for my unit, I built a custom slide for a propane-converted Honda EU2000i, converted the stick storage box to power cord storage, and added a wireless remote power switch for the backup camera. Already had an Efoy fuel cell from my previous camper-- TCM has an article about that in their archives-- so stuck with that as about equivalent bucks instead of going lithium-- stayed with 220 AH of AGM in the factory battery box. Nice job re your battery setup :-) Like you we also did the second cabover wardrobe, sans shelving in our case, but deleted the storage unit on the counter and went with a full-size non-Legun table. I believe the picture of that table option on the Northstar site is from our unit.
One other mod you might want to consider down the road is a supplemental roof coating, not so much for a no-leak warranty given how well the roof is made/sealed, but for things like tree strike damage. I did the rvroof dot com polyurea coating from the folks in Florida, and it's saved my butt/roof at least twice so far. No more roof seal maintenance in any case.
Enjoy your rig-- we certainly love ours :-)
