@nmstough, sorry but I’m still confused about which part of the instructions you think are wrong. The instructions call out these part numbers as shown in image below:
if you buy those connectors and use 1" section of copper as instructions call out between your main 3/4" line then that will work. I originally thought you had an issue with the ball valve of the 25551LF SharkBite due to not getting enough flow, but then you proposed a U724LF fitting which is confusing. The a U724LF fitting cannot replace the 25551LF SharkBite coupler with integrated ball valve, so where were you planning to use it?