Howdy fellas! So, I'm almost done servicing my rear shock... but I'm having a hell of a time bleeding the air from the shock body. I'm using the instructions found here: http://idriders.com/proflex/files/shock%20service.pdf My problem is that I'm having a hell of a time pulling the damper/seal head UP after I've pushed it down. There's a very strong vacuum happening. I can pull it up eventually, but it sure is tougher than the down (in) stroke. Is this normal when bleeding the air from the rear shock body? Or should it be easy to pump the assembly in and out?