Yep...Nexus all teh way...I sell NDZ stuff, but even I dont have one..issues when combined with a Delrin pin, too light can cause drop off, and then you have to fiddle with LPR and dwell, taking it out of balance and making it inconsistent and gas hog like.
Or so I've heard....
Until a lighter spring is available (robof9) for teh LPR, I would avoid it.