I used the existing housing. But it would be easy to measure new housing, just be generous with length and cut back what's not needed at the lever.I just ordered a OneUp dropper for my Evo due to the concerns about top tube frame damage. I'm curious if you replaced the X-Fusion cable housing in the frame, and, if so, how you determined the length needed at the seat tube.
I've also put some DyedBro on my top tube to help protect it, I will see if I can fashion up some sort of protector to stop the bars from hitting. I like flat bars and running them slammed.
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