I have used IDM with a Jag in training but not on OPS.To be honest I wouldnt have time to input all the info into IDM when I need CAS unless of course it was on a planned OP. For me its a radio to Hachett/Warhawk to bid for air then its return fire until the jet checks in. Not a fan of IDM and most of my FAC mates that have used are not too keen either.