There was a little trick involving playing it on £1 a play and getting super hold off the bonus, it was'nt technically an empty because the machine would alarm once you had a few JackPots, i was lucky enough to do several but it did'nt last long, best to give them a miss now i reckon!!!
A couple have done in the past, Invincible for instance (the machine) gave a name fill that allowed you to gamble too mega streak if you lost a gamble, most of them though will automatically award the top via three of a certain symbol, saying that hilo silver clones can give an invincible if you get 3 extra lives, this is very rare to get though and i've played lots.
I've actually had the 1'er a few times, the JP repeated (bake it) then the Hots went £50 as well, yeah the next person is getting w*nked on, no more than £2 boards for a long long time;)
I had several Vivids repeat, Reel A Win, Pie Factory and Giant Gems have all done so, And the red came back next board, i'm sure we all smashed the Vivids back in the day, great times;)