[rodH]

Great thread guys.

I am getting ready to do a sub enclosure. I have a dewalt plunge router and am going to make a jig, seems easy enough.

I actually have a rotozip as well with an adjustable jig, but I am making it out of 1" industrial MDF and a couple test runs I did, the best way I found with the rotozip was to do it multiple depths, but even that gets slightly uneven (not a huge deal, but I am going to build another piece of decorative wood that is going to surround the 2 drivers, and need them to be PERFECT circles and the best/straightest finish possible. My buddy has a dewalt router I am barrowing for the project, it seems to feel more solid and should provide a better cut/hole.

My question is this, some people mention to use a straight or upspiral bit. Which one do you prefer? I am planning on buying one, so I can get either one. The upspiral is about $5 more, but that is no big deal if it works better.

Also, if I am going to cut into 1" MDF and 1" plywood, do I have to have a 1" bit, or do I buy something shorter and just keep dropping it lower with the plunge router? If I am JUST using the bit for this project is the 1/4" bit the way to go?

THANKS!!!