jharpphoto::
I have designed my retention systems so that the lock is disengaged during the draw stroke, on a fixed blade sheath the lock position is located to place the index finger of the right/left hand on top of the lock, with a push of the finger the lock is disengaged and the knife ready to deploy.
The lock on a folder sheath is located at the front of the sheath and is disengaged with the thumb or in most cases can be manipulated with the index finger with the hand in position for deployment.
As for anyone having experience with my retention systems, I have supplied sheaths to the following knife makers, Daniel Winkler, Todd Begg and Gary Melton.
Dealers that I am working on prototypes for, TAD Gear and Les Robertson.
I have many sheaths in the hands of Military personal, LEO, SWAT and the FBI not to mention the sheaths I have supplied to civilians.
You are welcome to contact any of the above that I have mentioned by name for their opinion on my work, all of the feedback that I have received from them has been positive.
Thanks Much for your interest.