This is not a complete how to, but I figure this will get most of you well on your way to making it happen.
I know there are a lot of P90 mods out there, but mine is done different than most everyone else, and IMO the easiest way that makes the most since.
So here ya go.
Note that there are two things that are different about the mod that I later changed different from the pictures I took of this one.
These are the only internal pics I ever took of any of my P90 mods, and I don't own one personally to show you the differences as I sold them all, with no plans to build any more any time soon.
The differences I made are for one, don't use the stock reg. You can see how I had to shave the sides down, and if you look at the top close, you'll see how I had to shave the shell on the top really thin to accommodate the banjo fitting.
Take my advice and break down and get a CP LP shorty reg. Its a better reg anyhow.
The tap for the banjo fitting on the top of the thread saver is 10/32. Just as it is on the firing can.
Use a clear bottle o-ring to drop into the thread saver, then screw the reg into the cap holding it upside down to seal the reg from leaks.
You'll need to fill the original forward firing can banjo hole with a cut down frame screw and a little plumbers tape. This will plug the original hole. Then you will need to drill and tap a new one 45 deg from the center on the right side of the can to allow the can to be placed in the shell at 45 deg for the feed neck to be able to lean to the right side. You'll want to buy a tall clamping feed neck to replace the stock one, and buy a 45 elbow for the hopper to ride in you can find anywhere. One like the SP8 uses for example.
Also note that the battery position was changed to the rear of marker, behind the reg so that you can access it to change it out when necessary via the drop down door on the back of the P90.
Glue a little foam against the door, or make a sleeve for the battery to rest in to prevent rattling around in there.
There is a lot more to this mod, but that is where your questions will come into play.
I don't have time right now to write up the entire mod.
Here are two vids I had previously private on my google account.
This is the first time I have posted them publicly.
When your done, you should have something that looks like these>
This post has been edited by WarCowboy: 20 August 2009 - 01:22 PM