Dear Richard. In response to your question: I believe Schaff has a few varieties, one has a longer base than the other. My experience has always been that you have to grind down the rail to make it fit. This is the first time I have heard of one being too long-or high off of the rail, if that's what you mean. The solution would seem to be to grind down the repair clip till it sits where the others do. Schaff of course, will mail you samples, I hope this is of help. Sam G.
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