Once you decide which unit to get. Contact the manufacturer and get technical drawings for the module, diode driver, and power supply. These drawings will show you how big each part is. It will also show you the location of the laser beam output so you can see if they line up with your scanners or if you need to redirect it. The RGB modules usually come with a suitable AC to DC power supply. You can then determine if and how it will fit in with your projector. If the supplied power supply does not seem to fit you can look for a different one that is smaller or a different shape (we can try to assist with this).