Haha! Well, I suspect that although the experience will stay with him forever, it's not what he's all about (but DO ask him about his experiences! It's fascinating!)
Anyhoo. I've finally heard from him. Sadly he's in quite ill health, although still pretty chipper. I'll be meeting up with him soon so will see how he is before asking him. I know he'd be keen, but able? We'll see...