I'm looking at getting some crash bungs in the not too distant future. Now I know there are two different sorts, Engine mounted and Frame mounted. Are there any advantages of one over the other?
The only stuff I've ever used is R&G's, but they are engine mounted aren't they, and the pic I saw the other day where someone crashed and the crashbung had really damaged the engine has slightly put me off them.

Damage I've seen from engine mounted bobbins.
http://www.loscrashprotection.com/ I think these are frame mounted rather than engine mounted.... I think.