I know there has been some discussion on here about how the quarter window rollers break and need replaced or adjusted, but never could find any advice on how to "REPLACE" the roller themselves, so I figured that one out. On the opposite side of the roller is a nut, it doesn't look like a nut, just looks like a washer with 2 oval holes in it, and what appears to be a rivit in the middle, well it is actually a nut that is threaded on the roller. They sell a spanner wrench in Classic industries, or if your lucky like me, and have a machine shop at your work you can have your machinist make one. Just put the spanner wrench into the holes and spin it off. I had a heck of a time figuring this one out, i read somewhere that it was a rivit and needed to be drilled out, glad I didn't do that. So it is a pretty easy task if one knows "HOW TO" do it. Also, the 1/4 windows are completely adjustable, forward, backward, and sideways. There are adjusting screws on all 3 of the "anchor" bolts, there is a slot cut into the end of the anchor bolt for a screwdriver to fit into, that will adjust the window in toward the interior, or out toward the outside of the car. And the anchor bolts have slots that will tilt the window, forward or back. You need to have the top up and secured to make the proper adjustments.You need to remove the rear seat, and the quarter interior panels, to get to these adjusters. (on a convertable anyway) I hope this helps anyone who may be struggling with this, and once again i would like to request a "HOW TO" section on the site. What do you think Geoff.