Disclaimer: forgive my lack of technical vocabulary lol.
Anyway, for the 1 year+ that I've owned BBH one of my pet peeves was how hard I had to hit that buck to make it register. Through that time, I have seen many BBH threads asking how to make the buck more sensitive to no avail. Well, today I finally tore down that buck to see exactly how it works and how to ultimately make it more sensitive (and the fix is easy).
To make this long post short; basically, the switch is a metal rod going up into the brown casing and is surrounded by a metal plate. When the ball hits the brown casing the metal rod makes contact with the surrounding metal plate to register the buck hit. There is a spring Between the metal rod and metal plate which is where most the problem of the assembly resides. When the brown chassis is taken apart the spring is loose and the metal switch mechanism is very sensitive. Putting the assembly back together restricts the spring and the metal rod.
With that said, the fix is easy; add washers to the two main screws of the buck brown housing assembly and also to the buck itself. This allows a lot more breathing room for the switch to work. I put two washers on each of the three screws for a total of 3 washers on each of the two side screws holding the brown casing together and 2 washers on top of the bucks back. The washers on the buck are important ones as that screw goes into the metal rod which pulls the spring inward restricting its path of movement.
When taking the 2 screws on the side of the brown casing out, use a nut driver with a small screwdriver underneath (pf out and vertical). Don't worry about those 2 screws coming out, the track guide is narrow enough that screws will stay in place. Oh, and you'll want to take off the plastic warning under the pf to allow access from underneath. In addition, I moved the buck to the left side of the pf using the coil diagnostics setting "move buck forward". For me it just seemed easier to access the screws. Remove the nut, add washers, and replace. Then add two washers to the actual buck (big long screw) when putting that buck back together.
Hope this post made sense and hope this helps for current and future BBH owners. Happy buck shooting