I've had a fun time with this, more caps than I can shake a stick at!

Bottom line for me: If you can get away with using a film cap do so 'cause every 'lytic is flawed in some way, they all seem to have an uneven freq response that even a humble metallised polyester cap shows up.

So I'm no longer wasting time with them and have moved on to some old Orange drop polyester caps that have a much better presentation. In the pipe will be some Multicap RTX, AudioLinks and Soniqs film caps.