But screw tops??
Nearly all wine in Australia has been sealed with screw tops in recent years. For a while they were treated with suspicion but they are no longer seen as inferior to corks. We don't produce any cork in Australia, to the best of my knowledge and I think the the imported corks were of variable quality.
I did notice when I was in France and Italy, a few years back, that most wines were still sealed with corks and I take it that it may be the same in the US. I won't be surprised if that changes in the near future. If it does, I would expect that you will find that screw tops are quite acceptable.
John, the Frontenac sounds good. We may be just a little too far apart to trade grapes.