I haven't cut mine back that far but I did cut .5oz off of a 1.5oz bolt, still plenty threads. I recently found, (on here I think), a .5oz aluminum bolt that I bought for about $8.00 for another D-series I have. I need 1 more bolt to experiment with as I don't want to cut the steel bolt back anymore, thanks for that info. Where did you get the nylon socket head bolt?