I would rethink using 6 CIM motors on your shooter. You don't need 2000 watts to shoot a 3 pound ball.
A
BaneBots CIM-U-LATOR,
VexPro CIM-Ile or
AndyMark CIM-Sim will allow a BaneBots 550 and/or 775 motor (you're allowed 4 total) or an AndyMark 9015 motor (you're also allowed 4) to mirror a CIM with the exact same mount pattern and the *same* rotation speed as a CIM. All of those motors can be put in 30A slots if you're out of 40A slots.