Doug-
This kind of adjustable cam wheel has been around for years... I've not heard of many of them coming apart. Though, on most other makes they are external to the engine oiling system and might not cause severe havoc. Even so, isn't the clearance from sprocket surface to cam housing cover tight enough that the screw may not be allowed out?
Just an academic discussion, really, as I agree with you. We already have adjustable sprockets... in essance
Price is way out there too!
-Michael
__________________
Michael
'82 Euro SC 'Track Rat' 22/29 Hollows, 22/22 Tarrets, Full ERPB F/R, Rennline Tri Brace, Glass bumpers, Pro 2000's, 5 pts, blah blah blah
'13 Cayenne GTS