Yeh the black can be replaced with a darker colour marker (I mentioned that in the meterials section maybe). I like the black because it adds a crap load of contrast and makes it sketchier. I'll try with a 60% though.
The final product was also pissing me off. I was actually going to rescan everything, but I finished at 10PM, so I really didn't feel like redoing it all. It may also look pointy in the back because I had to stretch it, For some reason the original scans weren't good.
If the stepover is bothering anybody, just check out my other sketches. All of my marker stuff recently was done EXACTLY this way.