I've got a Vaquero Grande, a 5" Voyager clip point, a 4" Voyager Tanto, and the Scimitar. I have loved them all, but no longer carry any of them. They get scary sharp and all feel good in the hand, but they've all developed the same problem. After a short while of practicing inertial openings, each one has developed vertical play to varying degrees with the Vaquero being the worst. Go figure. The VG can be opened by hand a good 1/16" in the locked position, it rattles.
None of my Spyderco's have had this problem to any degree, and I've opened them much more the the CS folders. BTW my Spyderco carries are the G10 Civilian, Military, Endura 98 and Goddard.
I have replaced the Vaquero Grande with a Sifu, but will keep the VG for practice. REKAT considers inertial openings as abuse. They may not be the same but it will work for me.
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All you need is love... a sharp blade and a full clip