Let's get back to the build shall we?
First you get some wood, I prefer 3/4 HDF no medium thanks or at least not for the rings. Medium density fiber wood can be used if high density is not available.
Here we have a piece of scrap that we will be using for the job of making the rings. This means the wood rings that the mid driver and tweeter will eventually mount in to. Two seperate rings will be needed of each size.
Some people use templates, I use the speaker itself. Trace the outline and with your jigsaw or what have you (DIY guys) cut out the rough shape.
Next drill some pilot holes large enough to accomidate the blade on your saw. Then start cutting from one spot to another in thirds. Soon you will have something like this.