Not too long, maybe 10-15 minutes of frustrating non-success, then in a patient, calm moment, it just went correctly and very easily. I can see that when it is aligned perfectly, and only perfectly, the pin slips in easily, but any forcing and it will never go. My son-in-law was there too, and I don't remember, maybe we had an extra finger or two in the deal that made it easier. Thanks again.