They're not cheap any more so it's worth conserving the ones you have left. I'm looking at other options for larger sizes. KBG caps aren't easy to find anymore either. Polystyrene maybe, or silver mica, but both are quite bulky. The Russian stuff is mostly available from Ukraine and ex-Soviet countries like Bulgaria, but stocks are nowhere near as good as before.The FT ones are, I agree, very good indeed. I still can't usually navigate the size problem though. I have (some courtest of Andy, thank you) a load of the .1uF ones, but in cases where closer to 1uF is needed, a garden shed would offer suitable casework.