Seat Runners?

[Luke2842]

Got to the stage of trying to fit my Triton Seats, I know a lot of people have used Metro seat runners but I think i'm missing something as I cant work out how to modify the runners to fit? I've bent the handles so the runners fit onto the seat but the the handle doesn't clear the seat to release the runners and I can't work out how to modify it so that I don't have to put huge spacers in to lift the seat up? Also whats best to mount the runners on steel strip or box section? Just trying to keep the seats as low as possible without them fouling something.

Thanks,

Luke