I am glad you ended up being satisfied. All engine builders have failures and all engine builds have those little nit picky problems as well. The key is to pick one that has the best track record and I am not sure that that is the case with Southern. I too had issues with an engine builder who will remain un-named. When I found my new one who is now my partner in the Miles Project, it gives you a whole new meaning to the term "sleep at night" His failures and problems while not nonexistant are certainly at the lowest possible percentile. This guy volunteers to go to the track with clients without asking for compensation just to babysit a motor. Clients end up paying him just because of appreciation. So, his reputation is really stellar. He is also jammed up for quite some time so, this is not a sales pitch either. We are turning away work because he feels if he can't devote his usual amount of time to a motor and feels it has to be a "rush job", he would rather not take it on.
I have been spoiled with this guy.