I'd love to have the ease of the OEM knob with the reliability of the Pingel but that would take lots of mod work to do.
Other Honda petcocks. I've a manual one off of a VT1100T, and will try it out whenever I finally take the tank off my IS to do all the work I wish I had the space/time to do it. The reserve stack is defiantly a different length than the Valk's.