If you are capable of handling that sort of airframe, then by all means, go for it. Many of the 3D airframes will do pattern nicely... up to, probably an into, the intermediate level.

If you want a pure airframe for that engine, the the Venus II is an excellent choice. I've made some minor modifications to mine that make it a bit more precise.

Anyway, in most cases, it's how you set it up that makes the difference between a pattern plane and a 3D plane. With Pattern, you don't want excessive control throws, you want more resolution and less radical movement.

With 3D, you will put in as much throw as the airframe, and you, can handle. So, for the beginner to intermediate level, it comes down to what you fly and how you set it up. Pure pattern will go for the pure pattern airframe setup. But if you have your mind set on that Yak, then, by all means, go for it, but if you want to use it for pattern, build it straight ( careful attention to such things as the squareness of the tail feathers, and the relationship of the horizontal stab to the main wing, then how much throw you actually put in the controls. Then comes the trim and all the work it takes to get it properly in trim for straight level flight plus pure straight for certain maneuvers.

Good luck.

CGr.