Guys,
Yes it's verified with TL061 and CA3080 and using NPN 2n5088 PNP 2n3906 with Zener 1n5228.
BTW you can also use 100K log for better threshold just experiment.
Sorry for the delay i'm so busy I benchmarked all with the same set up with my TScreamer and AMP. First on the FRONT using single coil guitar-noisegate-TS-AMP. TS set to full drive and AMP loud enough to hear the noise. Result.: Expander- just minimum threshold good fade at the end no trailing noise, guitar sound one is to one when on and off
Boss- full threshold with minimum or considerable stuttering or trailing noise, guitar sound one is to one when on or off
Mxr clone- 95% threshold with no stuttering but lost in volume, guitar sound not one is to one when on and off.
Now I put the noisegates at the BACK chain Guitar-TS-noisegate-AMP.
Result: Expander - max or full in threshold with minimum stuttering when fading but very considerable.
Boss - full threshold loud hum can not tame the noise defintely failed in test it is only good at the FRONT of the chain.
Mxr clone - full threshold hum still audible but not louder than Boss, guitar sound fairly low. THAT IS WHY I DITCH OUT my MXR and use the casing for other project

My Rating
Mxr 80% due to volume lost
Boss 85% good on FRONT
Expander 95% but not 100% or perfect.
Cheers,