Does a Groove Tubes FatFinger-clamp add sustain to an electric guitar?

** Listen with headphones or using stereo monitors! **

My own little test proves inconclusive, with the results seemingly more dependent on things such as plectrum attack and vibrato than on the FatFinger.

In the clean clip the track without the FatFinger seems to sustain longer, while in the overdriven clip the result seems the other way around.

• Guitar: 2006 Epiphone SG (G-400)

• Pedal: Mad Professor Simble OD

• Microphone: Sennheiser e609