In my view the vented bolt provided by BDX is to short. I've had mine back out a couple different times even after I re-torqued it to 32lb per spec. I also had a buddy with a BDX adjuster get stuck in the clutch he couldn't get it out ended up cutting off the end to remove it. He called BDX on this issue, they were aware of it and I belive explained some of their machined adjusters were having thread binding problems. Funny thing is they never offered to replace his adjuster. I ran mine for a couple rides and took it back out. I also was having problems with the threads binding but I was able to get it back out. For those two reasons I went back to the stock setup. Real easy to loosen the bolt and add or remove a shim for belt deflection, it's also a snap to change a belt. For the 20bucks I don't think it was worth it.
