Put the internals into the two switchshot shells. The two halves should be able to rotate around the single screw and allow you to get to the screw holes.

Take your Star Trek trigger, and place it against the double switchshot. Find out the spacing of the small trigger pieces, and glue them into place on the trigger.

Put the trigger into the LSFG handle, and put it together. You should have this:

Now it's time to assemble it. First, bolt the larger, bottom polycarb piece (the one that now has 5 holes) to the LSFG handle. Then bolt the Polycarb/LSFG handle assembly to the gun. Then bolt on the smaller, back polycarb piece. When you're done, you should have this:

At this point, you're done, but you will probably have to tweak the hell out of it to get it to work. I ended up having to sand parts, add a stronger spring to the LSFG trigger, and add a second layer to the polycarb rails I added to the LSFG handle at the end of step 4.
You may also want to sand/dremel down some of the sharp plastic bits near the handle.
Here's the finished product:




And for the first time on one of my mods, a short demonstration video!
It was taken with my shitty camera, but it turned out better than I expected.

EDIT: Clicking on the picture doesn't seem to be working for me... Here's a
linkYou pull the trigger a little, and the left one fires. Finish the pull, and the right one fires. It works like a doubleshot - except it doesn't suck.
The trigger is a little rough, and I have to pull the trigger forward before I can fire it again. You can see me doing this in between shots in the vid.
I don't want to paint it. It needs a paint job, but I like it the way it is.
Ranges are typical of stock-ish Switchshots - around 50" flat.
Overall, I'm happy with it. Even though I have to fiddle with the trigger a little, the ROF is great, and having a sidearm with two shots will be great. This is basically a springer-splitfire.
I tried to make this write up as clear as possible. Sorry the pictures are so blurry - my camera hates close-ups.
Questions? Comments? Flames?
Edited by AssassinNF, 09 June 2009 - 06:07 PM.