Hi, our T690 Avantgaurde 2004 is fitted with roof rails (bars) that seem to have slots on the inside face. Would these be suitable for mounting a couple of panels using Tee bolts do you think? Could you foresee any issues with having the panels approx 4" off the roof, ie wind beneath the panels etc? I've asked Burstner the question but no response as yet so thought I would ask the collective wisdom!