Firstly, disclamer: the filters at my work knock out all non-hosted pics so I don't know if any of these links have pics. Secondly, while not familiar with "FVJ's", RSCB's will generally use anything with a tip that isn't wider than the foam - including full size 3" long darts (the dart needs to be able to slide down the feed tube without getting stuck. Full size 3" long darts rarely hopper well due to the amount of bending required to get past the wye.
I'm a big fan of RSCB's they're a great piece of tech that shoots every time without fail, and works well on a small air supply. Just remember to point the barrel down once before each shot to seat the next dart. I'm not sure if i've seen a write up either, but the basic concept is that you have a loose fitting tube (feed tube) capped on the back end teeing into a tighter fitting barrel and an air supply coming into the middle leg of the tee.
You can either sand down the internal stop of the tee so the feed tube slides past the middle leg and drill a hole through the feed tube at the middle leg or (my personal preference) harvest a clear feed tube from a basic marshmallow blaster, chop one end off to the desired length and wrap e-tape (to create a tee friendly seal) around the chopped side such that the feed tube hangs past the middle leg of the tee once it's inserted into the tee. The "magic PVC" refers to the 5' pre cut lengths at most hardware stores. For some reason, they're slightly thicker walled so you can pound a cpvc barrel into them to adapt the cpvc to pvc fittings.I forgot to lable the bottom black elbow, but I've found a cpvc elbow nests well into 1/2" pvc fittings which reduced dead space a little.
These may be helpful...
and... have a crappy MS paint drawing...
Edited by shmmee, 21 December 2015 - 11:03 AM.
"and we should respect the people who make our blasters. Even if we do molest the hell out of them..."