Oh goddamn jesus ****ing christ mother****er son of a ****ing ***** ***** **** **** **** **** goddamnnnnnnnn
I guess you prefer a discussion about "Style versus Tradition" over this question?
OP...E5 is just an alloy that Specy uses on some of its road-going bike frames - all of which, I am pretty sure, have vertical dropouts. Does your bike have vertical DOs? If so, what are you doing to adjust chain tension? If nothing - your problems could possibly be nothing more than a poorly fitting/stretched chain...