I was successful last year fitting a High Roller using the Allan Kelly method. The HR is now worn out so spent last night replacing it (with a Maxxis Ignitor fwiw).
Getting the thing apart is a bit mucky so if you are a serial tyre swapper that may be an issue. Cleaned the worst of the gunk off the ghetto rim strip (Schwalbe 20″ presta) and then went to refit that. Just left it soapy after having cleaned the gunk rather than make a special soap solution.
As usual, couldn’t get it to seat using a track pump so resorted to the tried and tested CO2 canister, which whacked it up first go. Alarming popping noises as the bead seats, but no issues. (www.tyreinflators.co.uk for cheap CO2 btw)
Deflate – add Joe’s, refit the presta inner and repump with a track pump now the beads are seated. Rotate and wiggle to coat the insides and this am the tyre has leaked a bit but nothing that a small top-up and ride won’t fix (as last year, i found that full sealing of the tyre walls took a couple of weeks to happen 100% – although i do think the tyre this time round is a bit less flimsy / more impermeable which might answer that point)
Job done start to finish in 45 mins and this time round didn’t even need a tube to ghetto, which was the fiddly bit first time, cleaning it out and trimming the edges when done. Total cost – 90mls of milk and a CO2.
Do it.