Simon wrote in message ...
Chris ... just be careful and you should be fine with 1 straight edge,
don't
make the mistake of watching the cut, watch the edge of your base against
the straight edge, make sure that both bits of worktop are well supported
Which means you need 4 supports of the same size. I use those nesting
plastic storage bins. Cheaper than saw horses and don't take up much room.
Also the lower height is better for circ saw operation. You can put your
foot on the workpiece and have both hands free for the saw. Make sure the
batten you're following overhangs the worktop at the beginning of the cut by
6" or so. This means that the blade is in the right position and spinning
niceley before it touches the workpiece.