I have had tons of sebenzas and have had no lockup issues with them. I have always been one of those 50% lockup guys but have had sebenzas up to 80%. The lockup never changes much over the years and with heavy use. I have used and gripped them so tightly that the lockbar will go to the other side and it takes more force to disengage it, but this is normal. The next time it locks up, it will be back at 50-75% range it was before. This was a concern of mine at one time and I asked Chris Reeve himself and he gave me a 20 minute education on the framelock and it's design. It was 20 minutes that will last a lifetime and I learned a lot, a hell of a lot. So you have NO Worries........... I personally prefer the older sebenza design over the newer inkosi. I am not a fan of the ceramic ball detent and much prefer the older design that defined the Sebenza.