If the tyre goes over the rim easily when you are mounting it, it will be difficult to get the air to seal, even with a compressor. I have found ignitors are larger in diameter than swalbes (same rim) there must be some tolerance in diameters of tyres so not all will be like this. just expect it to be hard to inflate if it goes over the rim easily. Tubeless tyres are easier as they are stiffer sidewalls. If its a foldable tyre, unfold the tyre the day before you mount it so it returns to a round shape and you dont have 8-10 kinks on the sealing edge.
you don't necessarily need UST tyres ! get the kit and try to set it up with your current non UST Ignitors... quite a few people run non UST tyres tubeless.
(because they are lighter and cheaper)