What is so bad about curves? Jeebus. Shift what do you think of this? Sorry about the look of the tubing mspaint doesn't give too many options.
Nothing if you can account for their behavior. If a tube is bent it will allow further bending to a certain degree. I can't figure for that variable, so I will keep them straight. Plus I dig the look.
I am also still not convinced that the engine would have been hurt if hung as I was intending, but there were too many other issues with that setup to pursue it further. There are tons of examples of like engined bikes that I could come up with.
I am much more happy with this setup, cleaner and simpler. I just need to buy a shitload more tubing now.....