This is a final follow-up about my sale of the OB4. A large number of people responded to my offer to sell my OB4 System. Most of those people also asked me about why I sold the system. For ease of response to many people here are my thoughts (for what they are worth):
For some reason a lot of respondents thought the OB4 is a binding system. Remember that the OB4 is a RELEASE system (not just a set of bindings).
Here is the sequence:
1. On the top are the bindings (whatever you want) BUT in the event of a release you need to stay in the bindings.
2. Under the bindings there is a binding plate. The binding plate screws onto the bottom of the binding. Theoretically you can screw whatever binding you want onto the binding plate (as long as it fits onto the plate).
3. The binding plate then attaches to the OB4 release system. In the event of a fall release pins release the binding plates thereby releasing the binding from the ski. BUT for the system to properly work (at least according to the literature from OB4) the binding needs to stay on your foot. If the binding partially releases and the OB4 also partially releases then I suppose you could have some weird combination of a partial release and maybe get hurt. Is this a bunch of bull$$$$? Could you argue that you might actually be safer if you have two release systems (come out of bindings AND the OB4)? Maybe, maybe not..... however, there are people that are better skiers than me on this forum and only a fool would not take their advice.
So why did I sell?
The reason I sold is that I could never find a binding that I was comfortable with that also worked with the OB4. I purchased the OB4 with the Roxa hardshell, however, the Roxas never quite worked for me (probably too stiff). I also tried some other bindings but was never able to get comfortable. A lot of people seem to use Vapors/Stradas with the OB4, however, to make sure that my foot stayed in the binding at release I had to tighten down the bindings so much that my feet were uncomfortable.
My previous bindings were FM E-Series (EVO) and I've used them for years without incident. I tried the FMs on the OB4, however, the same problem arose (tightening too much meaning my feet were uncomfortable).
So - loved the OB4 engineering - just could never find the proper binding that worked for me. And since I've never had release issues with my FMs I've decided to purchase some new FMs and move on.
I did notice a quirk about the OB4 that has nothing to do with the release. Since the OB4 system is mounted under the bindings/binding plates the skier rides much higher above the surface of the ski than most skiers are used to (maybe a 1/4 inch higher). This increased height might make the skier feel "tippier" and more top heavy. I know that this increased height sometimes affected me in the course - both to the positive and the negative. Depending on my body position (good versus not so good) I had some really good sets and some really bad sets with the OB4s. I would speculate that if the skier always had great alignment and stack this might not be as big of an issue.
I hope this helps clean up any lingering questions about this thread.
Ted Thomson