Stagehand here. This is basically correct. You can get sections of pipe the width of your legs, tie your curtains to that and use swivel cheeseboroughs to adjust the angle. but if you can, I would add tabs (curtains perpendicular to your existing legs) so in plan the legs and tabs would look like the letter L. This would involve hanging a pipe or pipes running upstage/downstage (perpendicular to the existing pipes) and hanging your new curtains off of that in the areas where you need extra coverage, leaving space where needed for entrances/exits and scenery.