I just purchased a new 6x26 mill and have my first project. My nephew races micro sprints and has been involved in a few frame altering situations and the last time that the car was repaired the motor mounting brackets do not line up properly. He has asked me to mill a couple of new motor mounting brackets. Does anybody on this forum have any idea as to what aluminum allow I should use. I milled one out of 1/4" 6061-T6 for practice but the finished mounts will be made of 3/8". I have a couple of pictures on my Flickr account so that you can better see how they are used. They hold a 600 CC motorcycle engine in the car.
http://www.flickr.com/photos/stanleygill/
http://www.flickr.com/photos/stanleygill/