I just did it for mine - they are not that easy to fit because everything tends to get in the way of everything else - the front block of a cocker wasnt designed for the extra space. Basically the way i did it was to remove the ram and the lpr, then fit the ram , then back the ram out half a turn to fit the qevs, then do the ram up, then re fitted the lpr, then put hosing on everything.
Basically I would advise you to do a dry run of where you want everything to go, then when you know what order to screw things in, then and only then use locktite to seal it all up. Given Belsales or planet would probably do it for about £10 unless you are determined I'd get them to do it.
Having said that, if you are prepared to put a couple of hours max into it then theyre easy to fit yourself.
That was my experience anyway.
Tom