Have you sent it yet Matt, if not i'll send some up to lovetone foc.
My fittings take 6mm hose which is standard stuff in the european air industry, rather than the american so called industry standard of 1/4" (6.35mm).
It's also important to make sure you push the hose right in passed the two seals, rather than one seal on the other fittings. If you're not sure about this, i can send you a data sheet.