Update: I shot with the magnetospeed yesterday and couldn't be happier. It worked great and no point of aim issues when I had it mounted properly. I ran into an issue when the arca clamp loosened up (probably didn't tighten it up enough). It caused the magnetospeed to push towards the muzzle and contact the muzzle brake which threw my shots about 5 feet high at 1110 yards. It took me a second to figure out what the hell was going on. I tightened it up and shot another 20 rounds without a single issue.
I will probably make a side mount for head unit and possibly switch the angle over to tubing. Not sure yet.