08 swerve, 8 runs of #25 chain, how many issues we had with them? 0
if you simply pay attention and take care when aligning and tensioning it, it will not go anywhere on you. (1 of those runs was holding back several hundred lbs of surgical tubing)
btw this is biohazard a former world champion battlebot i believe
and it uses #25 chain for the drive
http://www.botshop.150m.com/Biohazard.jpg