Has anyone used or seen in person the 440 Source flywheels for mopars, here is the info, just wanted some feedback if anyone has used this.

1045 Billet Steel Flywheel - New
Our brand new heavy-duty billet flywheels are fully CNC machined from high quality 1045 super hard billet steel. The ring gear is made from high manganese carbon steel for accuracy and superior wear resistance. Ring gear is 130 tooth, weight is 27 pounds, and the overall diameter is 13.19 inches. The diameter of the machined face (without the ring gear) is about 12.5 inches. These fit a standard six bolt crank flange. The larger of the two bolt patterns measures 11 5/8" across (bolt hole center to center) and has 6 bolts evenly spaced around the outside of the wheel. These can be used for either internal or external balance applications. They include a small weight which is bolted to the back of the flywheel. This weight can be left on for external balance applications, or simply unbolted for internal (neutral balance) applications. These are very similar to the Mopar Performance part# P4529142. Fits ALL Mopar V8 engines (even small blocks!) Works with 10.5 inch clutch only.
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I tried searching for the post that asked about the 440S flywheels.
Basically when all was said and done, the OP decided to go with a Brewer's reconditioned, if I recall correctly.

neutral - it's for my son's 416 stroker going in a 72 Duster

I got one for my mild 440 build. Since the motor was balanced I decided to get the machine shop to check the flywheel. It needed some machining to get it to true neutral. Overall I have no complaints with it.