Like with the dropzones section, there are loads of variables that I could put in, but I want to keep it as simple as possible.
I imagine with all tunnels, if you know who/where/when to buy time you can get it cheaper that the advertised price, but if I was going on holiday to Moscow for example, I doubt I'd know/find the people to talk to to get it cheaper - especially if I decide on the spur of the moment to have some tunnel time. I imagine the relative discounts will all be fairly similar from tunnel to tunnel, so a price comparison would still possibly give you a decent ranking order, even if not the actual absolute price you'll pay.
Horsepower is something that I'm not sure people adding tunnels on to the site are going to know. I didn't know the diameter of Airkix in the UK for certain and I've been there, so if I don't know that chances of knowing the horsepower would be slim.
Indoor/outdoor would be a reasonable addition... I like it being simple as it is just now, but will consider this one.
(This post was edited by degeneration on Jan 23, 2009, 4:07 PM)