I'm of no help but just had to say, I don't understand how people could chop on a qr frame. Lol. All kidding aside, I believe Carl Bartlett is building his own frame.  Not sure if it's a 250 or a 500 though.  Anyways here is a link....

http://www.suzukiquadracerhq.com/bartlett-racing/2015-weapon-x/

You might send him a personal message with your questions.  I know he's a busy dude but that's who I'd go to for help with anything.  He really knows his stuff about the 250's, not sure how much experience he has with zillas though.  But it never hurts to ask.