STOP DIGGING!!
Well I'm on the other side of the world, and my paver consultant in the states counseled me a little bit on the different methods, but here goes.
First off, clay is not a bad base, its hard, your alright. You should only dig it deep enough for your base coarse and your pavers. Now that you dug down so deep, your going to eventually have some settling, especially if you don't do a Super Duper job compacting your base coarse in lifts. (2-4")
Now, I'm not sure you need it or not, but landscape fabric is useless for that, in my humble opinion. If anything you want to use geo, but its probobly not a must in your case.
And for your base coarse, 3/4" stone with sand on top will not compact. REAPEAT: IT WILL NOT COMPACT!! For a good base coarse you want a good mix of large, medium and fine aggregate. If you try to compact an angular rock like you want to, you have too many spaces in between, you need the mediums and the fines to fill in the gaps and give you a quality base. We use 4-6" if it will only have walking traffic and there is a good subgrade. Make sure you spend enough time compacting your base because of the subgrade you disturbed; I can't stress that enough!
For your finish layer, the way I'm told is washed sand. I know some people use chipstone or fine stonedust but I guess powers much higher than you or me formed an institute and they say the sand is the way to go. I'd take their word on it!
Well, the morale of the story is, if you have a good base, don't mess with it!! Only dig until you hit stable ground.
My paver consultant wanted me to include this link to a past thread on this subject. Thanks Lanelle!
http://www.lawnsite.com/showthread.php?threadid=3053
[Edited by guido on 11-30-2000 at 04:07 AM]