I'm having such great success with the OL hybrids that I'm now looking to purchase the 19* to go with the 22* and 25*. If Cobra had a 16* I'd buy that too and use it as a driving iron. I called Cobra to see if there was anyway to build such club using f7 hybrid and they said that they didn't offer weights heavy enough to get the F7 head weight high enough. Sounds like some experimentation might be in order.
How do the cobra OL hybrids work around the green? I would image that they would make the ideal chipper & bump and run club. Are they effective as a rescue club for use off the fairway? I ask because I am looking at the 19* as my 200yd club, but would like to have more than one use for the club.
I posted earlier about the use of a Ping DI as a SL club (check it out, it might be what you are looking for). You can add heavier weights and the hollow head allows for hotmelt. Mine is at D2 swingweight @ 37.5.