[SOLVED] Tool changes: Do I need clamps for the Some Old Guy method?

Newbie question. On this page, [Some Old Guy Coding] recommends clamps to help homing for the tool change. Are the clamps needed if I just push the head to the lower-left corner until it cannot move anymore, and use that position every time? The machine is square.


Solved. Heard directly from Some Old Guy himself, the clamps are not necessary.