Yep, we did try some of my o-rings on there on a few of the keys, but as you say, it then wasn't nice to type on.
Hmmm, think I may try her with reds then (I have reds and o-rings and it isn't nearly as bad as hers).
Are there any decent ones for around £50? I'm sure there were a range for around that price, but can't remember the name?