Originally Posted by
photogravity
Out of curiosity, does it look as if the tube is sloping? I'm not sure I'd be able to visually detect a 3-4 mm slope in a top tube. I don't have answers to your questions.
yes it looks level.I put a level on it and if I lift the level a couple of mm on one side the bubble goes between the lines,signifying exact level.I was thinking however that since there is some play for the wheel in the back dropout,true level would be very rare.