Two things here.
I know this has been picked through already on mutliple threads, but can someone give me a rundown of whether or not a 15* ergo grip is something worth considering? I had problems on my last hike using a friends pole with a straight grip. Going downhill, only my pointer finger and thumb were able to grip the pole when extending it forward for a downhill step…and not very tight, which translated into less weight taken off my knees.
Also…
I have a highschool cross country background that gave me some knee issues, and about a year ago I started running in minimalist shoes with a forefoot strike which has aleviated most of those issues in my knees. Is there any merit to hiking with more of a midfoot to forefoot strike to alleviate knee and hip problems? I'm sold on that style of running but just not sure how well it translates into hiking. Check out http://naturalrunningcenter.com/2012/03/06/video-the-principles-natural-running/
The reason I put both of these into one topic is because I think they would relate well in asking the question, "What is the most efficient way to reduce stress on your knees and hips?" I realize preferences are huge here. And if I've overlooked an article or thread that answers the question, feel free to point me in the right direction.

