I have the Zunsports on my 981C-Base w/ parking sensors. The middle vane does not fit well, at all. I *think* this may be specific to the Base w/ sensors. In fact, I had to make some serious cutting down to get it in reasonably well, which doesn't look great but will save the radiators on an upcoming roadtrip of a few thousand miles. (I know some may say I fitted it wrong, but I didn't. Honestly!)
I contacted Zunsport and they were very good, to be fair. But I think I need to go there to get the issue resolved. I am in the same country, but about 4hrs away, so it remains unresolved.
There is also some strain in the corners of the plastic Porsche grille/opening, evident from the fitment of the bottom vane. This does seem to fit "well", but the tightness of the fit, necessary to hold it in place, is the cause.
With a properly fitting middle piece, I'd give Zunsport 8/10. As it is, 4/10. When I get the time, I think removing the bumper, cutting some Aluminium grille and fitting from behind is going to be the best option.