wokri,
when I did mine with the door laying back side up I used 3-M's black adhesive and set the channel, then by hand pushed the window up into the channel and layed a nice thick beach towel on the glass and then put 10 lb. of weight on the glass to hold it down nice an tight till the 3-M setup over 24 hrs. then I removed the window glass and did my riveting.
came out very nice.
