I am planning to build a multiple diode 650 nm (4 or 9) lab laser based on a single heat sink with multiple holes to support the can style diodes. I need a good source for the diodes and a glass focusing lens for each diode. I do not need drivers or lens mounts. To make this work the lasers need an output that has a consistent angle relative to the heat sink flange. Any idea on the magnitude of this potential variability.