Front brake lever will not stay tightened
Do these brakes have a small adjuster screw just behind the lever blade? If so, that is a reach adjustment. It allows you to adjust the distance of the lever blade from the bar. Sounds like it's turning on it's own. Some brakes have this issue. What you need is the tiniest amount of blue (workable) loctite/threadlocker on the threads of that reach adjuster bolt. Very important that you don't get it anywhere else or else it will gum everything up. I would apply it with a needle or safety pin to ensure precise application- squeezing it directly from the tube may prove messy. Once that sets, the lever should stay in place.