White Water

Ball hangs on "lip" of reproduction ramp between Spine Chiller ramp exit and upper playfield

The reproduction ramps from Pinball Inc are excellent. Some Spine Chiller ramps finished manufacture with an almost undetectable "lip" at the exit point of the ramp. Prior to installation, use an Exacto knife or similar to slice that lip off.

Ball sits in "dimple" under "lock-to-upper-playfield" VUK

After thousands of landings from the VUK onto the same upper playfield spot, the playfield becomes dimpled. The ball will sit in that dimple until shaken loose or until another ball emerges from the VUK (as in multi-ball). A "Cliffy" protector will solve this problem quite elegantly. [1]

Ball spins backwards after being launched up the "lock-to-upper-playfield" VUK

Sometimes, the ball will "backspin" after being ejected from the upper VUK, slowing gameplay. Install one (perhaps two) rubber post rings (or rubber grommets) as pictured here: [2]