I HATE the way my arrow high mounts look. They don't seem to fit right. They are not high enough, and stick out too much.
My bike;
(http://farm4.static.flickr.com/3309/4621504613_3b58988ed7.jpg)
How I wish they'd fit;
(http://farm4.static.flickr.com/3635/3486011557_e6309e9620.jpg)
How hard is it to fix?
I have always thought the Arrow cans are too skinny and too long, IMHO. Plus the pipes that lead to the cans are long as well, putting the cans further back than they need to be. As for the pitch/angle at which the cans are installed on the bike, could you modify the brackets a bit so it would raise the end? Sorry, I don't have Arrows and my comment probably doesn't help you at all. :P
Well you could cut/chop them and take a few inches off to take care of the length problem. As for bringing them closer to the subframe...maybe fabricate a few brackets like Goat_Herder suggested.