All good man. I sent a PM to @Lowlight and really do appreciate it. Hope you put a set of the cards in your bag for a rainy day. If you like them then share.
How do you pimp free tools man? How much profit is there in free?
How about you check out the tool and see if it is helpful to shooters and getting new shooters up to speed.
Free system that will really help with all the data and building a firing solution. 8 agree with everyone that you cant depend on electronics.
1stshot.org
I second the check your sight rail and scope mount. Make sure everything is rock solid. I blue Locktite mine because it can be a tiny movement that you don't feel or see but it can affect groups in a way that you demonstrated.