Are cheap cogs really bad for my hub? I just ordered a fixed/fixed formula and I have to order a lockring and cog now. Bikepartsusa has a Cyclo cog for 10$, and a nicer cog for 20$. Ive been using the Cyclo on a suicide hub for a while with no problems. As long as the lockring stays real tight I should be fine right? Or should I just suck it up and get the expensive cog? Thanks in advance for any help.