Bleh !

Well I am in the middle of an LST upgrade for my front and rear diffs and I'm stuck....I have the diffs mounted in the bulkheads perfectly (thanks MC!) But I have run into a problem. I ordered the 8mm Aluminum couplers from Mike and I got them yesterday and they don't fit...The 8mm part is too shallow to fit the whole shaft in...What do I do now? I tried drilling the coupler out longer so it would fit and it just doesn't fit right...Any suggestions??