#52 I like how you're coming up with new ideas I like how you put in a symbol in between the m and p I like how the P turned out but the m looks a little too weird also the A in amp looks a little weird with the a how it is.
#60 I love how you just went all out with a new design. Not a 100% what I'm looking for but your getting on the right track! maybe the A can tie in to the bolt with the P? to make it look like it's part of the bolt? I don't know just throwing out suggestions!