What are you trying to achieve? 1. Quicker turning 2. Different bar pressure 3. More power
I Have a few parks, post me and I can let you know

Im flying the 2012 parks (8 & 12) and have tried adjusting the wingtip configuration. I didnt notice much difference, aside from a heap more bar pressure which I hate, therefore I keep it at the least amount of bar pressure. I'd say you would need to be riding in 20+kts consistently and in different conditions to benefit from those small adjustments.

I have not played around with the trailing edge settings, but often change the front attachments between the middle and the 'grunt' setting based on the conditions, I am amazed at the difference it makes, it is well worth trying.

The bar pressure adjustment makes no real difference to turning speed that I could notice. Changed it to the lightest setting for my session today. The new bar grip is pretty hard on the hands after a few days kiting in a row but im not wearing gloves. I'm on the 2013 park

Have played around with my settings lately. I did try the options on the bridle attachments and have found that in light to med winds I fly my tips on the middle settings, my leader lines on the middle, and have the bridles on the grunty settings. Has much better low end than I first thought. When it picks up a bit and I want a lighter bar setting for unhooking, I just change the bridle setting to middle or low grunt.
I find I can now fly it like my old Bandit with heaps of grunt and bar pressure, or with lighter pressure but still nice pull... happy boy.
At first, I was going to keep my Bandit 3 as well as this, but after 15-20 kites now, I wouldn't swap this kite for a new B6 and will happily sell my Bandit.
I also agree the bar is a bit rough on the hands, mainly just the left side though.