-Raised the outer parts of the firing runway, so that the rocket will stay inside the crossbow until firing.
-Raised the RB holders
-Raised the firing gear
-Changed the trigger to make up for the higher firing gear
-Changed the sight (higher, and easier to use)
-Took off the stock (stock isn't necessary for a rocket launcher)
Unlike the C3.1 mod, to build this gun, ALL THE STEPS ARE INCLUDED IN THIS INSTRUCTABLE.
Step 1: Bottom Part 1+ Firing Trigger
Step 2: Bottom Part 2
Step 3: Bottom Part 3
Step 4: Firing Gear + Building Up the Back
Step 5: Sight + More Back Stuff + Handhold
Step 6: The Front RB Holders
Step 7: The Firing Runway+Attaching Handhold
Step 8: The X2 Rocket
Step 9: RBs + Loading
NOTE: To increase the firing power, you will need to lubricate the firing runway. Take some Vaseline or some similar product, and a q-tip, and get some vaseline on it. Spread the vaseline on the walls and bottom of the firing runway, and when finished, run the rocket down the runway multiple times, to get rid of excess (cause you only need a very small layer).