I had Rapid Robs on my HT when I bought it. On the suggestion of the LBS I went tubeless using Stans No tubes kit. The rims on my bike were not tubeless ready rims (Maddux) so they needed the rim strip not just tape. To start off I will say that once the tires were seated on the rim I had no issues and no flats all last season….However!
Every time I had to add sealant it was a royal #%%$$^^%%^% biotch to get the tires to reseat even with a 5 gallon compressor set wide open even with the valve cores removed. Then after riding all winter with Ice spikers (also tubeless but they are officially tubeless ready) and trying to put the the Rapid Robs back on they absolutely would not seat. So at that point I said screw this crap and put a tube in there so I could go ride. Ready for this? 20 minutes after I inflated the tire the tire blew off the rim!!!! At least I wasn't riding. I think that the combination of the sealant and the tires not having the proper side-wall for tubeless destroyed the sidewalls.
Anyway, the whole tubeless thing is a P I T A. Sealant everywhere, seating issues and really if you cut the sidewall you'll still get a flat, maybe even a catastrophic blow out and you still need to carry replacement tubes just in case. I've been riding the last two months with tubes in Conti X-kings (which are way better than the Rapid Robs were, awesome) and no flats and even if I did, I can change a flat in 5 minutes. If I were you I would ditch the Rapid Robs and buy some good tires with Protection treads and use tubes.
The only way I go tubeless again is with tubeless ready rims and tires. Maybe. No Bullcrap kits.