-->..Your evidence for this is?..

you mean beside the thousands of different set ups in different species world wide that share the same masterplan but though developed independent.

I found it quite funny to think that everything was "designed" at one time when you take a closer look (;)) on any animal arround.
Snakes, bats and fishes having eyes would make god a miserable designer because they dont really work, though they still use the same set up as our visual system does.

If there is one basic evidence for evolution and random mutation its the inperfectness of everything. Thus making development necessary to be able to survive.

The human body has a hundred of "development" mistakes and weakpoints that are only explainable thru random changes and development. Parts like the thumbs, the neck or the shoulders are bad designs for such a species like we are. But are perfect development stages on the other hand.