Alan, that explains the one question, it did not shift perfectly when you were done in February.
Next clarification, several posts above, you said you removing 3/4 fork made no difference. What all did you remove? I am assuming if you removed the fork, you also removed the rail? and if the rail was removed, I assume that removed the interlock? And did you remove the reverse fork/rail/interlock also with no positive results?
I do not believe Peter referenced his problem, but did you see his problem? It seems reverse could not be selected do to some drag between linkage??? Possibly similar???