Not gonna tell ya how to live your life. But I'd suggest better tabs for the front strut upper mounts. Another thread you mentioned doing something from the sub frame to the swing arm section. Do it.... Plus, you can use it for a place to hook up a wheelie bar. You can even do it with adjustable ends so you can still dial the way the way the chassis loads up.
With that thing being a single it's not if it gets sketchy, it's when. And when it does, if you have puney tabs, they will wad up. The sub frame would be gone the first time it goes in to death wobble. Yeah yeah it's a track bike. Being as you're still picking colors I'm gonna assume it hasn't spent much time at the track yet.
As far as looks, sheet metal tank.......