[woodcote]

If prevention is better than cure... running non-mag reduces the impact velocity as cars will tend to slide before they de-slot rather than ‘snapping’ loose and flying off the track. 

I also remove the wings from my cars as part of racing prep - a little solvent (lighter fuel) usually loosens the glue from the underside of the body and the lugs will ease out with some gentle, but firm pushing. I then replace the wing, unglued (sometimes with a little blu tack to hold them in the body) so they may come off in an impact but are much less likely to break. You can have a racing rule that if the wing comes off in a race, the car must pit to replace it within 5 laps or serve a penalty / disqualification.

Missing mirrors, exhaust pipes and windscreen wipers are part of the racing scars and history of a car. I quite like that. What I do like very much is the little spares pack that comes in most Carrera cars - usually a pair of wing mirrors.