That list is a pretty nice list, with quite a bit mad yourself, kudos it will be nice to be with your creations for six months.
As far as the R1 hoodie, yea you could probably get away with not bringing it but it is fairly easy to mail things along the trail, so you could bring along to start and if you are not expecting to need it ship the the R1 ahead or home. Or have some one ship it to you for something like the Smokies But with this winter you really might not need it.
I remember the desire to ship stuff home and drop weight, but at a certain point I started to pick a few things up for the comfort of the ride. Maybe your R1 fits in there maybe something like a camera does, having pictures and video especially is pretty sweet but not essential.
What is the thickness of the blue foam. I went to a thin foam mattress and I think in the end it makes more sense to carry extra weight to sleep soundly, not having to wake up and reposition. I think you already are in the right direction carrying a full length pad, and in the same vain don't hesitate to add something more if you are not sleeping through the night. Getting good sleep every night is helpful for some down the road.
All in all your list is pretty sweet, what ever you bring is gonna work, or you will make it work. I imagine with a good amount of the gear being home made, you might have the opportunity to adjust or fix them yourself in the field and town. Besides gearshops, in some towns goodwill, and thrift stores are a good place to look to lighten, replace or pick up some gear.