Best jigsaw blade to cut fiberglass dash.!

[clayshooter]

What’s the best blades to use to cut fiberglass dash in my Ranger bass boat.? I’ve never found any that hold up very well, and I have to take a 1/2” each side out of the opening for my depth finder to upgrade to new style. Last one I did didn’t go as well as I hoped.! I had to abandon the jigsaw and use a rotary rasp type in a die grinder which does work but takes a lot of air and my compressor isn’t the best.! Anything better and some advice would be appreciated.!! Thanks in advance.!
Had this posted in bassboat restoration page as well

[MattVT18]

Dremel with the thick, reinforced cutoff wheels.

[krindgen]

Dremel with the thick, reinforced cutoff wheels.

This or a multi tool might be the best choice.

[bcreek]

Dremel

[Garfish]

Right angle grinder with a 4" diamond blade

[CatFan]

Remgrit jigsaw blade.

[Sleepy111]

Dremel rotozip bit would do, I’d just use a cutoff wheel in an air die grinder

[Mcjenson]

This or a multi tool might be the best choice.

They work well for cutting fiberglass.

[clayshooter]

Thanks fellows.! I have been looking at that little dremel saw with a cut off wheel.! That might just do it.!!

[electritek]

Get a Dremel and a rotary file. Magic!

[angleiron]

Get an oscillating multi tool. They have many types/sizes of blades and it is an easy tool to use that will cur through it no problem.

[bassboat1]

I'd probably use the oscillating tool. If I went with the jigsaw, I'd use my Bosch with the orbital action set to zero, the base covered with tape, and a fresh downcut blade.
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These can be jumpy - so a good heavy saw is key, keep your weight over the tool, and slow forward progress is essential.

[Transom]

Would a coping saw cut it? If you use a power tool you might want to use a respirator.

[DaveBrabec]

If you don’t have a Dremel. You can put a Dremel cutting wheel on a drill