See if you get a loan to start with.
Don't think that's going to be an option, unfortunately. What I'm hoping my LBS will let me do is hook me up to a turbo in-store, fit the mounting brackets (or whatever they're called) and then have a quick try with the different-shaped extension poles. (Having paid in advance, of course.)
I like 2 for clipping onto a road bike as they tend to be longer in the top tube so you need a shorter extension - but yout elbow pads are only allowed so far back.
Yeah, the top tube on my road bike is pretty long, so I suspect it will take some tinkering to get the proper fit with clip-ons.
the bars are longer so i can nearly get my elbow on the pad so i can support all weight on that part of my arm for as long as i want.
Ahh. I had assumed the pads were for your elbows to rest on - is that not the case?
Infact all three of those suck
Get some where the extensions mount under the handlebar, means you can dictate the height rather than being forced to live with them high
They were just for illustration purposes, but do happen to be the ones stocked in my LBS. Any other recommendations? Really not looking to spend too much, as I won't be using them that often. (The Deda's are £70-odd, I think.)