Haha, you guys are too awesome and so helpful
I will indeed pop down to H******S after work and take a look. Just spoke to the club though, and they would really prefer if I got a proper dynafoam cushion for almost the exact reasons mentioned by astir 8.
However, if I cant get hold of that stuff before sat, then im clear to buy a standard cushion at my own risk
As i mentioned in my first post, I would buy the one on the link I posted in that pilot store, but there is no UK stock. So I may have little choice at short notice.
Cheers for all your replies.. problem solved (almost)