When communicating, you get more responses if folks are comfortable reading your posts. No one is ordering you to do so, just saying you'll get more response.
I use a side pull halter with my horses. The gelding needed a bit for quite a while because he was used to it and it gave him confidence. Now he seems happy to be ridden in the rope halter.
If you really need to crank a horse's head around, or keep it up, you can do so in a side pull halter. Most of the time, I use about a finger of pressure to back up legs. You can also do a pulley stop with a rope halter, and a one rein stop.
I wouldn't use a mechanical hackamore for anything...just seems too likely for a horse to get hurt. I'd much rather use a bit than a mechanical hackamore. (Mechanical hackamore - Wikipedia, the free encyclopedia