I remixed the original design because there was a missing part (the peg that connects the pieces together) and there some duplicate parts that caused me to waste a lot of filament. Everything listed here should be enough to print your portal gun.

I didn't find the installation video in the original post to be very helpful but I'd recommend watching it if you do try to print this out.

There is not an easy way to add lights and wirings. I manually drilled a hole in my filament to create space for wiring and then filled in the hole with Bondo Putty and painted over it.

I'm very happy with how it came out! Below are a list of the parts (and count) needed to complete this print:

PARTS:

Body-Black-Portal-Gun - Need 1
Body-Black-Portal-Gun-5 - Need 3
Body-Black-Portal-Gun-5-B - Need 1
Body-Black-Portal-Gun-5-B2 - Need 1
Body-Black-Portal-Gun-5-B3 - Need 1
Body-Black-Portal-Gun-5-C - Need 1
Body-Black-Portal-Gun-7 - Need 1
Body-Black-Portal-Gun-10 - Need 1
Body-Transparent-Portal-Gun-core - Need 1
Body-White-Portal-Gun-2 - Need 1 but rotate it so the supports are on the inside of the curve
Body-White-Portal-Gun-2 - Need 1
Body-White-Portal-Gun-2 - Need 1
Body-White-Portal-Gun-2 - Need 1
Body-White-Portal-Gun-6-2 - Need 1
Claw-x3-Portal-Gun-Claw - Need 3, I skipped this because printer couldn't get this precise
Claw-x3-Portal-Gun-Claw-2 - Need 3, I skipped this because printer couldn't get this precise
Claw-x3-Portal-Gun-Claw-3 - Need 3, I skipped this because printer couldn't get this precise
Claw-x3-Portal-Gun-Claw-6 - Need 3
Claw-x3-Portal-Gun-Claw-6-end - Need 3
Claw-x3-Portal-Gun-Claw-6-mid - Need 3
Peg w Raft Support.acode - Need 10 I think, cut to length needed