This is my take on a few items.
1) These would obviously be RS808D - not KR808D. This would not be the first time a vendor went with something other than the Kangor original models.
KR808D has become a default term for 808D style cartomizers. That has become even more important now that 510 vendors are on the cartomizer
and cart bandwagon. There are actually 808D-2 and 808D-3 models as well but you don't hear much about them either. (We can still call them "crate")
2) It has been stated here in the past, (by Leaford) that the factory uses syringes to fill the cartos. That doesn't mean it's necessary for you to use any kind of needle. It's a personal preference. HOWEVER, it does appear that RS is attempting to devise a system for those who prefer to do it that way that would be standardized and less potentially dangerous. That's a good thing.
Misc.
A vendor, several months ago, had come out with a 510 battery with a flared ash-cap on the end so it would be easier to see the LED in the case it was flashing. I had reservations about that flair because it would be harder for the battery to roll it a straight line but easier for it to go round-n-round in a never ending pivot point. I think the position of that LED is classy and nearly perfect.
It provides a distinctive appearance and allows people to see ever more easily that it is NOT a cigarette that you are smoking/
vaping.
The entire setup looks like genius from where I sit.