Hi, I have a RDS111, medical cyclotron, which accelerates H- at an energy ~11MeV, (that I use to produce N-13, C-11 O-15, F-18) using the PCG-1000 foils. In the holder, the foil can get a little sag, or bend, so during the runs I end up having to tune the extraction position, I wonder can anything can be done about that considering the fragile nature of the foil, and how thin it is. I'de appreciate input, has anyone else experience this, how do you manage it? Cheers.