I did mine i think you need to unsolder it off the DBU board first I also jumped the record switches with 2 wires with a push button momentery switch so you won't hear the clunk of the switch when recording.... Also you have to limit the legnth of the recording so or when you get hit you won't hear sound all the time but the hits will count though.
On Daves site he shows how to record on the card.
here is what i did with my panzer III
http://www.youtube.com/watch?v=wuOpP..._order&list=UL