Thanks Kelvin.

I was chatting to a guy recently who had two 80 watts panels on his Troopy as he said that he'd found one wasn't sufficient. When my mate was saying he had a 170 watt I thought bonus, but was unsure whether a domestic roof panel would handle the flexing it may get on a roof rack. I don't want to go to the expense and trouble of buying the panel and making the sliding tray only to find the panel can't handle the vibration/flexing/whatever. Although he'd still have another 3 I could buy. :-)

Checked out your rig. Gr8 setup.