Side-by-Side Comparison (on the way...)
I have the Senoff windscreen on my SKY right now. I have the KappaSphere windscreen on my fireplace since the SKY is having elective surgery right now. Since the KappaSphere screen arrived while the SKY was away, I haven't had the chance to compare it so the Senoff side-by-side. But I will!
I can say this from observation... The Senoff screen is thicker and less flexible - more of a solid sheet of acrylic than a flexible sheet of plastic. However, the Senoff screen uses the factory screws which as a result are only "partially screwed into place" with the windscreen installed. I didn't really like that. And, when I tried to tighten them a bit more, I ended up cracking the end of the screen and breaking the last section off of it. It's hidden in the trunk so it doesn't look bad, but that just leaves the fourth screw of four at a weird angle.
The KappaSphere bobbin system seems to be a much better way to go. It appears more secure, and I like the fact that there is special hardware included and we don't just use the factory hardware in a way that it was not intended to be used.
Also, the KappaSphere shield being thinner and removable makes me feel better about wedging it in the slot where the top would be when raised. Let's say for the sake of argument that the KappaSphere sheild is only slightly thicker than the canvas roof. If the shield is in the slot with the top down, then it's roughly equivalent to the roof being up in terms of impact on the seals and the fit of the deck lid. The Senoff screen, on the other hand, is thicker and not as easily removable. That means that when the top is down there is something thicker in the slot. With the roof up, you have the normal thickness of the canvas in there plus the added thickness of a thicker-than-canvas shield.
To put it mathematically - let's say that the canvas has a thickness of 1, the KappaSphere shield has a thickness of 1.5 and the Senoff screen has a thickness of 2....
The total measure of "stuff jammed in the slot" for the KappaSphere solution is 1.0 with roof up, and 1.5 with the roof down. In the Senoff approach, the thickness is 2.0 with the roof down and 3.0 with the roof up - much more compression of the rubber seal, greater risk of forcing the deck out of alignment, and much more force required to close the deck lid. You really have to whang it on down - and that can't be good. It might not be bad, but it can't be good.
Soooo... Once again, separation anxiety kicks in. I can only talk about it, I can't illustrate it. But I will later this week. I have both screens, and I can show lots of photos of them and compare how they attach, their thickness, their contour, etc...
All I need is to have my car back. :banghead: