Looks like you were using two-piece torsion bar blocks. I have never tried them as they look a little less stable than a one-piece block. Also, with a single block, if you do break or lose one bolt, the other bolt stops the block from falling out. And for bush repairs, if you stick with steel blocks, in a pinch you can weld them in.
Bit of a case of shutting the gate after the horse has bolted I know, but it's food for thought. Most people 'wheel less than a days walk back for help, but when you're remote, little details can make all the difference.