After recently acquiring a new in the box original Disc .50 cal, I am pondering whether or not I should upgrade it with the Extreme FPJ conversion kit? As long a I can get the original orange discs, the conversion kit sure seems pricey to only use FPJ's in it, vs, just buying the discs. Is the juice really worth the squeeze to do a conversion to it? This is my first Knight rifle, so I don't know what I don't about it, right now.