The largest mark is in the middle picture, but there are a few other really small marks around the Yuuksta. The Yuuksta also comes with a pair of short spike stacks from ricerocket! Offer Up! The worst I can say is no! [/s] DONE!!!
It is pretty smooth, it has a very tiny vibe, but that is pretty normal for hubstack mods. It would be much worse if any regular person stacked it, but Ricerocket did a great job on this.