I saw your post on forabodiesonly last week about this same issue. John replied to that post telling his side of the story, I will cut and paste that below. Sounds like John tried to make it right, but you refused to give him the chance. Also, how is it possible to put the sprag in "backwards"? The outer cam is riveted to the case, and the inner race can go either way. The springs and rollers really can only go in one way. Something sounds fishy about that.

John's reply on forabodiesonly......

When Darrel notified me that there was a problem with his 904 transmission I immediately got in touch with the technician that was working on the car for him to help troubleshoot it. The transmission had no forward gears and after some over the phone diagnosis it was apparent that the transmission would need to be removed from the car to be looked at. Understandably, Darrel wasn’t happy with that news. I apologized and assured him that I would make it right. I told him that I would pay for the shipping to have the transmission sent back to my shop, make whatever repairs were necessary, and then ship the transmission back to him within a couple days of when it arrived, all at absolutely no cost to him. During our phone conversation I made that offer to him at least 4 times, all while he was yelling at me, interrupting me every few words, and being totally unreasonable. I finally told him to cool off for 24 hours and call me back the next day so we could discuss it and I hung up the phone. I never heard back from him until he emailed me a link to this post. I totally understand that he is upset that his transmission has problems, I would be upset too if the situation was reversed. I tried to do what I could to resolve the situation, but he refused to even have a rational conversation with me about it.