If you are worried about vinyl, trace your opening with a pencil and then use a razor, but go SLOOOOOOOWWWWWWWLLLLLLLY.

A saw that size is a hundred bucks, not worth it for 2 holes, to me.

Keith:

http://www.offshoreonly.com/forums/f...aker-hole.html

http://www.offshoreonly.com/forums/g...remel-one.html

http://www.offshoreonly.com/forums/a...iberglass.html

Also, have a second pair of hands there; specifically holding the shop vac right behind your cut.

I used a dremel. I dont really care if its "perfect" since the speaker covers it up.

is this what you mean?
https://www.youtube.com/watch?v=VpSgKfYASGk

Vibrating cutter... Take your time.... Lots less dust!!

http://m.lowes.com/pd/PORTER-CABLE-3...ol-Kit/3851689

Similar to that, yes. They offer different styles at your local Home Depot or Lowe's. I find those to work well, just go slowly. Also, you can sharpen them on a bench grinder. I've had mine for some 15 years.

IHey Brian,

Thanks for the threads, appreciate them.

I will upgrade the stereo in the AT.

2 - 10 inch subs
2 - 8.8 coaxials
2 - 7.7 coaxials
2 - tweeters
1 - MHD 900/5 amp

All JL Audio and M series speakers. I'll start with this and see how it is and if need be ill add more later.

[ATTACH=CONFIG]531999[/ATTACH]

For me it really depends on the hole I have to cut and the area I have to cut in. Whenever possible I use a hole saw of the right size. 10" hole saws are pretty expensive, so I will use a jig saw or a rotozip for those.

Just have to ask what is your plan for the speaker placements? I don't see what you need the extra set of tweeters for, unless your 8.8 & 7.7's are going to be placed very low in the boat.

That system you have right there should make plenty of sound. The 10" may have a bit of a hard time keeping up with the four coaxial speakers, but should add some solid bass to the system.