Achieving perfect collimation is barely possible with these screws. After I damaged the Allen heads of the screws by incorrect use of the wrench I replaced them with custom made screws by Chris Heapy . Meade by the way, was unwilling to provide the screws and here in Belgium they could not be purchased since European standards are different from US-ones. They insisted on the scope to be returned at a very high cost which was unacceptable. The screws are very well crafted and allow very precise collimation.
Largest advantage is that they are adjustable from behind the eyepiece.
No wrenches are necessary anymore. Chris proved to be very helpful and even send me two pairs of unpaid screws just to make sure I got the right ones.