Mike the Dart works great on the highway I have just come back from a 3,000 ks trip in 2 days riding and just yesturday a 1,000 ks trip, the Dart brakets for the screen bolts to the headlight bolts, so if you need them to make a kit for the Commando is to measure the distant from each side of the headlight brakets, I don't think they would have no problems with making one for the Commando and they are made in England, the kit take less than 5 minutes to mount, I have had mine on my Thruxton for just on 2 years now with well over 22,000 ks and have had no problems with it at all, it keeps the wind off your chest area but still get the breeze in the face just the way I like it.
Ashley