Thanks guys :) I am a huge sucker for a buckskin too, one of the reasons I looked twice at her considering I was specifically looking for a gelding that would mature 15hh+ and preferably around 16hh. I figure I can compromise on a couple of minor points if everything else is right.
She's 13.1 1/2 at the wither and 13.2 1/2 at the croup, assuming of course that my measurements are correct (I haven't sticked her, just used a measuring tape, so I might not be measuring perfectly level). So on the average of 13.2, assuming that she's 90% of her mature height at 12 months old, she should make 15hh. I don't think she'll get much bigger than that but I can only hope. Both string tests say 15.2 so I could be lucky. I won't mind terribly if she doesn't get to 15hh if she's chunky, I'm not tall so she should take up my leg well enough... I just couldn't put her to Cougar, because he's 16.3 and I don't want to breed my girl to anything more than a hand taller than her.