I believe mine are also the balsa ones. 2017-18 model, anyway. Which is fine by me since I weigh 140# sopping wet.
No, I'm sure it's the driver, not the skis or the mount point. I'm blaming early season bad habits. Actually, my first day on them was in new-ish snow at JH, boot top deep in places. I liked them just fine then. And the day before, when that snow was freshly fallen, the SR97s were just stupendous. My <<minor>> problems on them were in bumplets at Snowbird a couple of weeks ago, in crud snow. Maybe for the skiing I do, the SR97s are just more to my liking. I'll get it figured out. If not, there might be a cheap pair of SR88s in 168 up for sale in the spring.