For guys waiting to hear about the CAST caps they are still coming. I have talked to partsconnexion and they will let me know when in. Put the stereo back to vintage tube amp and vintage mid cap and Duelund tweeter. By far the best combo I have. (in fact don't like any other combo)
Very excited about the CAST caps. It will be almost a month later this week. I know the caps take several days just to make.
Expectations are to have MUCH less resonance than the vintage and more detail as they are copper as opposed to aluminum in the vintage. This is likely the most excited I have been about an audio product coming. I am also curious as to how much better the highs will get. Right now the signal goes through the vintage and then to Duelund. I expect improvement there just because noise will not be added by the vintage caps. The Duelund is not better though with Mundorf (mid cap) than vintage. (the plastic effect of Mundorf seems to overwhelm the quieter cap)
I will also post on the difference that I find in the tweeter caps from VSF and CAST. I have enough to run one speaker with CAST tweeter caps as well. I have been told it won't be as big a difference as from the vintage to VSF. (CAST vs VSF) I would expect not and am prepared for that. (as the VSF is already excellent)