I decided to make my A frame a bit smaller and save some weight. I reduced the arms by 15cm (to 16cm). This has saved 22g and the A frame now weighs 48g. My trekking poles have to extend to 135cm to get the correct height at the apex. Making the A frame smaller has not only saved weight, it makes storage easier. As far as I can tell, it makes no difference to the strength of rigidity of the frame. Indeed, it may be slightly more rigid as the plastic tube is more flexible than a trekking pole.