why a custom built converter isn't for everyone....

I'll bite. I think people are going to do what they want regardless of anybody's opinion. I agree that it may not be necessary for playing with stock or fairly stock parts, but it wouldn't hurt. I went after a custom converter from Dynamic several years ago. It was the most expensive transmission part I bought, but I feel like it was worth it. I went over the engine combo, weight, rear gear, tire size, everything they asked for and they picked what they believed was best. As soon as I get that thing going, I'll find out how well it cruises and behaves on the street and the strip.
I think Yellow Rose read my opening post as I was Anti-Custom converter. That couldn't be further from the truth. In fact, throughout this thread I've shown support for custom converters. My point was it's NOT the ideal way on MY particular project as I'm swapping key part, including engines, to justify having a custom built converter for all the changes. Yet, I'll need a performance converter to continue performing.