I'm in the process of ordering a custom frame. They are recommending a 72 degree or maybe a 72.5 degree HTA. I asked them about 73 degree and they are willing to try it but they sound a little unsure. I will be using a Pace rigid fork 468mm length and 43mm rake. I am currently riding a large Surly KM and I would like to quicken up the handling a little. I'm kinda leaning towards the 73 degree but I don't want to blow it. Any info would be appreciated.