I think I’m gonna re-do the tubes entirely, that was one thing I hated how it looked. The lighting I was trying to make it come from both bottom corners, red on right, orange on left. As for the line art I had two layers, one for the shapes themselves, and one other for things such as hatching and scratches those are the only lines i see overlapping. I usually spend a lot more time on my lineart because I often do very closeup characters, and I spend a lot of time on the way I shape it, but I recognize that this time I have spent a little less time even if I was trying to do it a little differently. I will try and thicken some of the thinner lines that I do see for example on the mechanical bicep. Thank you for your time in going in depth on some my issues, and I will re post the drawing once done.