Just on the air spring and oil topic, with solo air you can run a little oil in the upper air chamber, as the negative air equaliser is a Schrader valve that sits above the oil level. In a debonair spring if you put oil in the upper it will shortly end up in the negative air side as the equaliser is a dimple in the stanchion inner wall to let pressure past the o ring at top out. I almost prefer solo air as the oil bath in the upper really keeps it running nice for a good while...