Blakey,
Wouldn't know as apart from the 14 years as a techie I have never done a ground tour as an ALM but will be starting one in a short while.
However why not have a look at the following site which will hopefully help answer your question
http://www.mod-abc.co.uk/
Select pension calculator and then Input the following
RAF, MACr, 01/09/1957, 01/09/1974, 01,09,2012, AFPS 05, No, Yes, Professional Aviator, 01/04/2004, MACr, MACr, Level 20 salary 58467
Check the results and ask me if when I leave in a few years time will I
a. be like our ex gunner and feel the need to post in here every 5 minutes as I obviously have nothing better to do with my life
b. retire, travel, see the world and have a bloody good time in my retirement.
Whilst I accept that ex service folk are more than welcome in here I think that apart from the odd glance I will certainly be leaving this website for
the professionals who fly the non-civilian hardware, and the backroom boys and girls without whom nothing would leave the ground. Army, Navy and Airforces of the World, all equally welcome here. 
Edited to state the dates given are fictitious but close enough to the truth and for Al, select option b