Hi TS,

Just emailed you. Thanks!

My review on Eric's VS:

Car: Persona Elegance Manual

Installed VS about one week after I changed car batter,
Generally compared to battery only, I have observed the effect below:
- Less noisy idling; Smoooth engine sound,‎
- Much more easier to start engine in the morning, even compared to new battery.
- Light dimming when a/c pump kicks in turned out to be less prominent, although still there.
- The loss of power when a/c pump kick in during driving also less prominent after VS installation, however it's still there but it affect me less. Comes and goes away within a shorter period.

The above observation persist throughout my 5000km oil change interval, and I installed the Eric's GC‎ after new oil change.

In my case, VS+GC combi, when versus VS alone:
- Engine noise reduction improved even further.
- Starting ease maintain unchanged, if not better than before.
- Light dimming and power loss during A/C pump kick in further reduced. Loss of power unnoticeable for me unless very hot day, dimming is unnoticeable unless you specifically looking out for that effect.
- One very obvious changes is cabin light no longer dimming while I on the head light and double signal with engine running, compared to VS alone.

I communicate with Eric via email, gives him more time to respond with topic to refers to. Time to time he might overlook but that's OK since he one leg kick everything.

Attached are the pictures of my voltage reading with VS, and VS+GC. With VS alone the voltage some how higher but voltage fluctuation persist.
Combination of VS+GC brings the voltage to a state of less fluctuation.
‎
To me, VS+GC from Eric is definitely money well spent. Apologise for late review as I only do my verdict after Oil Change Interval.