I just bought a-129-3 for using it as an attenuator/offset generator.

There seems to be slight (and very short) lag time when processing external cv most noticable if you feed the output of a-129-3 to pitch input of an oscillator. This is probably because it works only with cv and not audio signals, right  

Also it is not very useful for attenuating very fast envelopes which is expected. Does a-183-2 behaves differently with fast cv signals

I don't have the a-129-4 so the slew input on a-129-3 is completely useless I tried to feed it with some cv signal but couldn't establish what exactly is happening.

Thank you for the answers!