Help with polyline attractor? Any help massively appreciated.

Hi everyone

I swear this should be quite straightforward but I just can't get my head around it right now.

I'm currently trying to use an attractor line to modify the scaling of some panels on a surface. I started working from a base file that modified the scaling across the range of a panelised surface according to an attractor point on a line. You'll see that at the bottom under 'remapping distances to the scale factor based on the attractor point.' 

That's now redundant, so at the top right you'll see my attempt to get a polyline attractor working which scales (and copies) the panels according to their distance from the line at their centers. I'm trying to do this within a range of 10% original scale to 80% original scale (0.1 to 0.8).

Once again, any help is hugely appreciated. Sorry for the slightly messy file.

Cheers,

Alex