Product review (1 stars): I decided that the wheels don't really need to roll -- sliding in the rail works fine -- so I just epoxied the wheels in place .
The tabs on the wheel axles will break in about a year, if not less. How do I know? I've already had to buy two of these. After the second replacement broke, I decided that the wheels don't really need to roll -- sliding in the rail works fine -- so I just epoxied the wheels in place instead of replacing them. If I change my mind, and decided rolling wheels are important, I will try this "improved" placement kit: http://smile.amazon.com/dp/B00SPYDSFC