a 4-6kg load spring or one out of a buzz bee twin tek
Vaseline or other lubricant(wd-40 etc.)
Step 1: SPRINGS
you will need a screw that is the same length a the night finders, but preferably with less width. i used the one out of a buzz bee twin tek (you buy it in a two pack) i did this because it was broken.
place the BB spring (or whatever spring you have inside the NF and place to the side
Step 2: O-Rings
just follow the pictures.
you dont have to put 3 o-rings on it just worked well for me.
now lubricate the barrel