gwylan ive found a spare cylinder on chambers site. the cylinder is a bit rusy so i was thinking of buying a new one and having it sent to isp or somewere else for a reblue as ive found the bluing on them at the mo to be not verry good at all, and they could send it to me to me fit it. saving posting the whole gun off and paying more postage costs. the calibre change was just a thort as i seen a .177 barrel for sale on here so i thort i could try but if its not a straight swap i wouldnt bother. could i change the air cylinder myself or is there more too it?