Well it looks like my mallet putter experiment is over with..at least for now. Accuracy was the main issue. It felt good during the swing, but most of my putts were on the low side of the hole, really no matter what I did(like aim top side of the hole) it still wound up below the hole. Maybe it's stroke lab shaft, IDK, but my blade style is going back in the bag. Coincidently, this is my second stroke lab shafted putter that I tried and both were very un-accurate for me. I am a SBST or maybe just a very slight arc type of putter. I'm at a loss for words!
Our strokes are very similar and I've found that either a center shafted or a double bend shaft really helps my stroke on the greens. My current gamer (SS9) had been a complete eye opener for me on the greens.