Hi Fmak,
You do have experience with the Soshin Silver mica's ? I was considering these for the KWAK-CLOCK.
Yes, I have used them for years. The SE is very expensive but sounds excellent as feedback or filter caps. They are terminated with flat leads and molded.
The FE version is coated with round leads and is the version you see in high quality Japanese equipment. They sound more rounded and 'ordinary ' to me, but perhaps better than the magnetic types which I routinely remove.
I have a small stock of FEs and some SEs, and may be able to help you out.
While I am on, can you do a post on relative merits of waveform in clocks. Why are some stock designs clean sine waves as opposed to not so clean square waves in 'improved' versions. And why are the latter better.
I want to replace the 45 MHz clock on Sony SACDs as an experiment.
Fred