Well, I spent two days trying to degass my Cab., finally I emailed
winexpert and this was their very fast response.:

"Thank you for your contact and for choosing our products. You only
stir the wine vigorously - the one time - the one day - stabilizing
day. It probably wasn't gas you were observing, after that amount of
stirring: it was more likely bubbles from the stirring. A good way to
check gas levels in a wine is to fill a hydrometer tube half-way with
the wine, plug the end with a #6.5 bung (or your hand), shake it hard,
and open the top. If it 'pops', then it's gassy. If not, then it's
flat. "


So, good lesson for me! I didn't try the hydrometer-tube thing, I
just quit whipping, topped up and later this week we'll see if it's
bottling time. Hope this helps others out there. Let me know if
anyone does the hydrometer-tube-shakey thing.