samson wrote:
I now have two scroll saws:

Craftsman 236280 in very good shape

Dremel 1671 in excellent shape

Which would you keep?

Personally, neither one. You make your own choice. Use your own
judgment.

Scroll saws (NOT JIG SAWS) have specific criteria.
- Table is flat all the way across, including the table insert.
- Can handle / use pinless blades. The better blades don't have pins.
- Easy to adjust table to perpendicular to blade. AND HOLDS ADJUSTMENT!
- Absolutely no left-to-right movement of blade / upper / lower arm
during blade stroke!! NONE!
- Low vibration. Critical that the table vibrates as little as possible
causing the work piece to transmit vibration to your finger tips.
- Blade installation:
----No tilt left or right
----Almost no tilt forward or backwards
(NOTE: a few models are designed to "rock" the blade when cutting with a
small forward and back motion during the up and down stroke. This is
bad if it occurs with other saws.)
- Wide blade tension range.
- Can handle European blades. (some EU blades are a convenient whole
number metric length, which makes them about 5.1 to 5.12 inches long.)
- Functional dust blower, or ability to connect a separate fish tank air
pump to dust nozzle. (remember, it is low pressure, high air volume
that makes the best scroll saw dust blower.)
- Quite. Low noise.

On the web based forums for scroll saws, it is common for users to
report sitting at the scroll saw for up to 4 or 5 hours at a session.
Users with saws like yours, the blades are braking at least every hour.
With the DeWalt and better scroll saws, blades break only due to
operator error, or get dull and are replaced before breaking.