Here's an article that may help:  http://www.limbobus.org/poptop.htm

-----Original Message-----
From: dj <djct2@YAHOO.COM>
To: vanagon@GERRY.VANAGON.COM
Sent: Tue, 23 Dec 2008 12:21 pm
Subject: changing pop-top canvas

Hi, I am thinking of changing my pop top canvas, 84 Vanagon.  I could
use
all the help and advice I could get.