I would like to see pictures of this extension device.

Once, when cutting Hardi Board Siding ( a lot ) I discovered that wet
boards (thanks to some inclement weather) cut smoother, quieter and
with little or no dust (the dust cutting dry boards with a Skill Saw
is phenomenal). So the wife and I formed a cutting team, she spritzing
the board in front of the blade from a spray bottle filled with water
- popi cutting with the saw.

Then, with lots more boards to go, I bought some 1/4" polyethylene
tubing, a bit of 1/4" copper, a valve to fit between and join the two
and a fitting to join the 1/4" poly to the garden hose.

At one end of the copper tubing, i place a small brad nail, then
hammered the tubing flat over it before removeing eh nail - forming a
nozzle, if you will. Then, I formed the copper alng the fixed blade
guard of my older skill saw so that the nozzle end of the tubing could
be set to squirt just before the cut and fastened the whole thing to
the guard with pop rivets and some wire restraining bits I had laying
about,

Now, to cut, I turned on the hose a bit, the opened the little valve
and cut.

No dust at all. Smooth, easy cutting with significantly less noise -
no more than cutting PT 2 by stock.

Later I heard about mounting the blade backwards and much later saw
the four tooth blades sold for this purpose. Bet they'd work better
with water added.

Just thought the safety-conscious guys on the list would love this
water, power tool, electricity and sharp object combination. Yous,
somewhere - I have pictures.