I used one from PSP Manufacturing (
www.pspmfg.com) as they have blue anodized ones that were hardly noticeable against the blue of the cowl. I mounted it near the bottom of the cowl, so as not to be very visible. Only problem is, with the line lower than the tank, it can have a siphon effect when opening it up to fuel, but just pinching the line negates that somewhat. I only ended up with 1 tiny hole in the cowl for the choke rod used on the Saito FG-84.