I do wheel and pad swaps by lifting the car only from the front jacking point. If you have a decent jack I would trust it enough to stick my head in the wheel well and give everything a wipe.
For extra safety just chuck a tire/wheel under the car. So if it does come down it lands on that and stops the brakes/suspension from touching the floor.
BTW I never put my head anywhere it could get crushed by a failing jack.
__________________
AX 1.1 --> AX GTI --> NA Roadster 1.8 --> E39 528i --> Xsara VTS --> Volvo 940 LPT --> Focus RS MK3 --> M2C + NA Miata 1.8
|