I have 20 or 30 of the racks labeled "66.7" (not "67.7") on the bottom of the middle barrel. The width of the barrels in these racks is generally OK, though it varies a bit from barrel to barrel and rack to rack more than the barrels in Paulson racks. What bugs me about these "66.7" racks, though, is the fact that the bottoms of the barrels aren't flat, and some chips poke up higher than the rest (typically, the the first and last chips). Stacks of these racks tend to be a little wobbly, too.
What has your experience been?