Indeed, that's a good point. It is the expensive "try" part that concerns me though. I've tried doing this with just one tire before, and the results were spectaculess.
One big leaky, gooey mess. I suppose I could give it another go. My preference would be something that DOES work over something that *should* work. :-)
The fact the tire says tubeless ready doesn't guarantee anything. My last two tubeless setups the non-tubeless tire was a snap and the TLR tire required an industrial compressor to seat the bead.
Once setup though both worked flawlessly.
My buddy bought some TLR tires and couldn't get them mounted on his wheels. The same tire works perfectly for me on my brand of rims.
There are so many variables in setting wheels up tubeless.