Originally Posted by jazz2561
Is the tube notched on both sides or just one side? How do you keep the dropout straight?
I am not an expert, but as far as notching for a dropout, the way I understand it is you do not notch one side or the other, instead you are basically slicing a thin channel into the tubing that the flat dropout can slide snugly into. You will still have tubing on the side facing out and the side facing in.
As far as keeping it straight, some type of jig is the only way I can think of. if you can mount your frame perpendicular to a flat surface and the frame is plumb, then you could use a metal framing square to true up the dropout before tacking it in place.
Hope that helped a little,