3 Way DIY

I am looking for layouts and blueprints to make my own 3 way crossovers any ideas

Perhaps you could include some more info and specifically what speakers you are working with here. There are few members here that are very knowledgeable about this matter.

Here is a list of links that will provide info, speaker-building programs and online calculators that you can use as suits your needs:

http://www.partsexpress.com/resources/crossover/xoverfaqs.html

Select the drivers carefully so that they will successfully cross over with each other.  As requested in the post above, list the drivers and their application on this forum if you need more specific help. 

I'm no speaker-building genius, but I've successfully built a few very nice crossovers with info, links and help from members of this forum.  Two years ago I didn't know what a crossover was.  The links above have been accumulated one-at-a-time over a long period of time and are valuable sources of help.  You'll see several programs in the FRD consortium that work using the Excel spreadsheet, and included is a program called Trace.  When you don't have the sophisticated tools and know-how to measure each driver's parameters yourself, as I don't, you can use Trace to derive responses from the manufacturer's graph.  This will help you take your crossover design up a notch from the basic "textbook" that you would get using just the calculators, some of which I've included links to.  Good luck with your project; it's fun stuff.

I'd recommend first of all reading my sticky thread up top on advanced speakers.  It will give you a run-down on what you are getting into and should provide some basic knowledge you will need so you make the right decisions for your system. 

I was rather proud of that analogy because it is so descriptive of what happens.  It is a rather frustrating balancing act because once you will get one "way" dialed in, it gets all screwed up as you work on the other "way" since they each effect one another.  Not to mention the difficulty of designing a proper crossover in the first place.