The coach of my team actually owns Next Gen Robots, the company that owns the CIM coolers, which came in the KOP.
To demonstrate, he did a 3 minute test of CIMs under no load, and you can see they make a huge difference. once you think about what kind of load your teams may be putting on these motors, you'll see they are well worth the additional weight.
www.youtube.com/watch?v=O-A6PXVUmW0
I can direct questions you may have to him, when my team meets tomorrow.