Hi Andrew,
Well, I am glad that this will solve your problems, but I want to point out a few things.
1. Connecting the negative color outputs to ground will not hurt anything. In fact, we recommend it. We do NOT recommend connecting the negative X, Y or Z outputs to ground, but the color outputs are OK.
2. Connecting a laser input to +5V will, in most cases, NOT show "jelly beaning", because you will not be exciting the phenomenon which causes "jelly beaning" to begin with. "Jelly beaning" is caused by modulation, and specifically, by "thermal modulation" that results from you modulating the power of the laser. So if you connect your laser to DC 5V, you have "no modulation", so you have "no thermal modulation" and thus, will have "no jelly beaning".
Also, "cheap" is in the eye of the beholder. Certain types of lasers will never exhibit "jelly beaning". For example, the Thin Disk lasers from Jen Optik will not jelly bean, and neither will OPSL from Coherent. But most of the more conventional DPSS lasers will, especially inexpensive ones, or ones from manufacturers who have not yet figured out one of the two solutions for that problem.
Best regards,
William Benner