For home built stuff an adjustable joint (threaded Heim) at each mounting point will save you a TON of headache by allowing you to fine-tune out that 10th of an inch you screwed up, as almost always happens.
It also lets you dial in some tension on the brace, if you want to do that.
If the mounting point is properly triangulated it won't move.
You could also look into adding a master cylinder brace. Some people love them, some don't notice them.