I've seen threads about converting flip caps to standard screw caps, but can't find anything going the other direction. I might get some flak for this, but I personally prefer the flip caps. Does anyone know if it's POSSIBLE to convert a 660 to flip caps? Maybe by using the fuel and oil tanks off of a 661? I acknowledge that it may be a lot of work, and it may be expensive, but if it's feasible, I can do the leg work to track down and price out parts.