30 inch pounds is cant be right, thats not even finger tight 
30 inch pounds=2.5 ft lbs
I was going to say I've seen guys break them before also. I've also seen the bolts break for the solid covers too. I upgraded mine to grade 8 hardware and just use a ratchet to tighten them. Heck if you get lube locker gaskets they dont even have to all be tight to not leak
