Thanks for the info, I wasn't sure if frame size impacted things or not.I believe that 600ml is max bottle size in any frame size as rear suspension design is the limiting factor.
No, the 5000 won't fit. Way too big. I've test fitted it as I own an Izzo. The only confirmed Fidlock to fit is the 590 with the dust cover removed and obviously the baby one. I bought the 590, but I won't get it until I get back from vacation in a few weeksThanks for the info, I wasn't sure if frame size impacted things or not.
Not sure if you have seen the Thirstmaster bottles, but they use a fidlock mount and are shorter than the standard water bottles. The Thirstmaster 4000 which is designed for a Jeffsy, holds 590ml and is 4cm shorter than a regular 620ml (21oz) camelback podium. They have a Thirstmaster 5000 bottle which is designed for the Izzo and holds 835ml. I don't know the dimensions of the 5000 but was hoping that it might fit. The Thirstmaster bottles also seem to be tapered at the base, so it appears you could get it further down into the bottom bracket area.