The component headlamp will stack with each other. The lower quality will turn the higher quality one into the same lower quality.
Otto outside Ray will offer a hunting quest northwest from Core City. I arrived riding a Devastator and:
1) When you tell Otto to "let's go" - he'll enter the cave but you have no way to enter.
2) If you are sitting right where the entrance is suppose to be and tell him to go ahead - you'll block Otto so he can't enter AND you are now blocked by Otto and can't go anywhere short of killing him.
BArm Grinder 350 - the power is set at 250 and consumption at 140%. I think you mistakenly set power at 250 when it should have been 350