I used a Dremmel powered screwdriver I purchased for around $75.  It is very
compact and uses lithium ion batteries.  It reached every screw location.

http://www.toolsnob.com/archives/2007/10/dremel_duo_stylus_driver_revie.php

I also went with the 3-window Bus Depot canvas.  I cried once and never
looked back.

2011/4/23 David Vickery <david_vickery@yahoo.com>

> Another gratifying project.  I starting replacing my poptop canvas at about
> 4:00 today and stopped when it got dark out. ...
> ... Wahoo, a new 3 window poptop!
>

--
Chris S.
"No solution is too complex to be executed incorrectly"