Seasucker roof mount on RC
I've used the Seasucker talon bike rack on my infrared RC and my wife's ES quite a bit. Works great, never had an issue with a pad losing vacuum, even leaving the bike on for a couple days they don't seem to lose vacuum.
Sometimes the rubber pads leave a white 'watermark' where they touch the paint. But the 'watermark' completely disappears a day or two after you take the vacuum pad off, just leave it alone. (By disappear, I mean you cannot tell where the pads were mounted, even in bright sun.) Not sure what causes it. You can also mount on the moonroof and rear window glass which I've done, but prefer the solid roof.