You may want to reconsider the nylock nut option. When I did mine, tightning 90something bolts sucked, I was also in a time cruch. I went with the 3/8ths impact to snug them down, if you do this with nylocks you wont get them apart again. Check out Fastenall for removable locking nuts. Also, run a BIG bead of clear sylicone around the rim side of the locks, this will help alot with the seating of the tire against the rim on the inside. I think the anti coning rings are a joke, totlay depens on what tire your running, my 38's dont leak and havent had a problem at all without them.
I welded mine with my mig, mainly because its faster
But after seeing your welds, I would have cranked up the welder a bit more since you were using fluxcore. Also shifting more to the rim side for more penetration on it. I always like to run more heat with the flux core, helps prevent porosity from happening a bit more. I give it an %80, could be better, but will work fine 
I welded mine with my mig, mainly because its faster

