32Red's WR is WAY too high!
Ladbrokes would be my suggestion - but no Americans!
Spin Palace or Ruby Fortune next then.
I think they both now do the bonus system where you can withdraw at any point = great if you hit an early biggie & don't want to be tied in to crazy WR!
Also they have regular 50% bonuses for low-rollers!

Don't know if they do Insta-whatsit though...?
PS: DON'T play ThunderCrap - it's a money eater. Try Ladies Nite or Spring Break instead!
Good luck!