I think if you adjusted your riding style to shift you body over on the bike during the corner to allow the bike to be more upright while carving the corners. I know I have one corner in my neighborhood that the tang of the centerstand of my P250 likes to drag. It's a standard suburban neighborhood and I am going less than 25 but I used to drag that tang all the time. I now shift my weight to the right and leave the bike more upright, the tang no longer drags. I am going to guess my P250 has similar lean angles to the newer P300GT.
Took your advice, riding around today I focused on shifting my weight into the corner. It was weird the first couple of tries but after a bit, I have gotten it down on right-hand turns. I can see now what I was doing wrong. The Yager is light enough that I can lean the bike without adjusting body position so even in hard turns my torso was normally still bolt straight, so I was actually leaning the bike waaaay over. I took a couple of turns that were sketchy before and I felt like I had plenty of clearance. Thanks for the tip.
Also, went down to the dealer today. They have the Downtown in, but they have not had a chance to put it together yet. They have opened the crate up so I was able to look at it, and man is it gorgeous. I liked the front end in pics but it is even better looking in person. The seat looks comfy as hell too, for both driver and passenger. I can definitely see the GIVI back rest in my wife's future. The only SLIGHTLY underwhelming part was the underseat, but I planned on getting a top case one way or the other and there is enough room for a helmet or a little bit of work stuff, between the case, the seat and a bungee net, I should have no trouble hauling what needs to be hauled. They said it should be put together on Saturday, I'm really excited now!