Merry and happy everything to all my fellow Yarbo mates. 
I’d been looking forward to getting my trimmer set up, and today was the first spare moment I had to install the Back Brace Mount. I’m no stranger to Yarbo’s infamously tight screws…I’ve already stripped two before so I was prepared. A little Kroil to loosen things up, working slowly by hand so I can feel every bit of resistance. I’m small woman with a few years under my belt, but I’ve wrenched on plenty of roller skates and cars in my time and I trust my hands. Three screws came out, a bit stubborn at first but manageable. That fourth one, though? Absolutely immovable. The Allen key snapped. The screw stripped. An extractor won’t budge it. It’s locked in like it was welded in there.
So here’s my question: can the brace be safely run with just three screws, or is that fourth one critical?