So I gave up waiting for the HBI Zhukov-S stock adapter (it's still not available) and instead purchased the Reptilia Corp (Side Project) LINK version. Both utilize the Magpul Zhukov stock. I received the LINK stock and found the sliding LOP to be very tight and the hinge button to be extremely hard to depress far enough for folding. These problems appear to be normal as YouTube reviews mention the same problems. Question is, has anyone found a way to loosen up the operation of the sliding LOP and to ease the depression of the hinge button?