I did this job recently.
-1" generic risers from an Ebay seller...cause the shroud to move backward a bit.
-The hoses were a bit snug so I removed the stock wire ties on the handlebars and repositioned the hoses so they don't get stressed when the steering is pivoted. Installed new plastic ties.
-I trimmed the ignition hole forward using a Dremel...sandpaper, a wooden dowel and a bit of patience work as well. Had to remove the dark plastic trim around the original hole, I will eventually decide on something to replace it with. I also trimmed the plastic key down a bit and repolished it...no interference with the housing. The key installs fine.
-Mine has the wire that the stock center shroud bracket clips onto...the rise makes the bracket too short. I replaced it with a piece of wire coat hanger that I painted black. It's about an inch longer than the sheetmetal bracket, with hooks on the end to catch the attachment wire. Installed it loosely, slipped the shroud into place, hooked it onto the attachment wire, pushed it snug and tightened the new screw.
-The smaller plastic covers mount right back on with no issues.
-The mirrors are not obscured. I don't notice any difference in airflow at the grips.
Seven months and it's still tight.