XXX-er, Yep, I've used the slot in the existing climbing bar.
Just slimmed it down a bit so it comes in at sub 40g.
http://snowmediazone.com/the_zone/da...r_-_weight.jpg
Need to change the double lock nut for a washer and nyloc nut plus I need to find some firm rubber to make a washer/grommet to go between the outside the existing climbing bar and the inside of the new bar as the trapezoidal shape means that the space between the two components changes quite a bit as the new climbing bar rotates, hence the slotted pivot as the new part needs to move vertically as it rotates etc. And the slotted pivot means that the new climbing bar sits on top of the existing one when in use so the load is taken by the existing bar not the pivot screws.