MY PA UPDATE:
I found a better power supply which is more suited for the PA adapter I have been using.
It is basically a 24 VAC 49 watt transformer with a CT connection for 12 VAC.
Whats nice is that it is already installed in a case and only needed small modifications to work.
It was initially wired with 2ea. 12 VAC outs with two 4 amp fuses, one on each out.
I un-coupled the CT winding separtating the outputs and then put them in them parallel.
This would make the transformer basically a 12 VAC only with the full 49 watts avaliable.
Replaced one of the fuses with a 7 amp and the other with a rectifier diode.
Now, using only one diode will make the 12 VAC only 1/2 wave rectified thus cutting power in half acheiving the proper power to the element.
All looked good on paper. Tested while watching closely the element and sure enough, take 3-4 seconds and started getting hot about the same amount of time as a fresh battery.
Gave a test run. Perfect, just like having a fresh battery all the time. I was using the 5.5 volt supply I had posted ealier but felt like a 50% charged battery. Which was OK, but this puppy blows that one away.
Found I have to be careful though, as I had to modify my technique. Like after a crumble stirring, you have to pay attention to your pull as it will combust. Normally when your herb is near the end and is driest your batteries are running down as well so combustion is much rarer.
But the hits, you can if you like pull until the herb is virtually black looking but turns brown when cooled down. To me thats as far as you can take it without combusting the herb. Myself, do not like taking it that low as I believe most of the good stuff is already gone anyway and the risk of combustion gets too high.
Having control to take it that far without the battery level in the equation is just great.
In conclusion, I have already posted the way the handle went together now this seems to be the best power source which is both small and relatively cheap or scavengable.
Hope this helps anyone trying to DIY for a PA.
Oh, and have to give thanks to OF for the insight to use AC rather then a high current DC device. Makes it much more simple.