Hello all - I installed my DIY posi lok per a popular write up here on the forum after discovering some missing sections of vacuum line near the actuator. Though I have had it successfully engage multiple times, I'm finding it more and more difficult to pull the handle, to the point I can't get 4WD to engage at all now. I've checked to ensure that the cable isn't locked, had it all apart 3 times to ensure there's no binding anywhere (fork action via lever seems fine when disassembled and off the collar)....am I missing something? A little disappointed after arriving at our wheeling destination last weekend only to find I was not going to get 4WD to engage. Thanks in advance.