One, is that the end plugging of the bullhorns actually need caps or something a little more water tight like a cover plug, I've been in heavy rain with the bars and they can get water inside and then they loosened my grips at the handlebar ends. I ended up using lockon grips just to make sure it didn't happen again.

Two, use small width handlebar grips at the two ends and then you'll have room for your controls and have a bit of room for the third hand resting area where the bullhorns and handlebars meet.

One last odd thing about the bars are that the bullhorns uses road handlebar diameter tubing (like you could put barcons on there) vs normal MTB width tubing.

Again I love them but just wanted to share the oddities of them. I set them up too so that the bullhorns mimic the distance/location of road hoods that is was comfortable with, then everything sort of ended up in the natural positioning for me. Slight upward bend up of the bullhorns / downward of the handlebars as Alee suggests makes them darn comfortable.