The multi function power tool from Harbor Freight (you can purchase it
on-line) is essentially a cast saw (the blade does not rotate) with a
different orientation of the blade. The blade is offset and parallel to
the body of the saw so it requires a different orientation to the
material that a conventional cast saw. You can get a variety of blades
for considerably less that cast saw blades.
The best part is that they cost about $40 dollars. I cannot vouch for
the reliability, but for that price, it is worth trying. I have one and
it does work, but , again, it requires cutting in a different
orientation than a conventional cast saw.
Mark Benveniste CP
VA Hospital Houston, TX
USA