Yes based on that paper I am planning to try 40mg and 80mg. I've already tried doubling the dose (to 20mg) and that had no discernable effect. I'll try 40mg tomorrow, and will of course report if I find anything positive.It would be interesting to see if further benefits are noticed at higher doses of MitoQ. Unfortunately this will be more expensive; although since @cigana observed that the effects kick in very fast, within a few hours of taking MitoQ, one could just take a higher dose level just as an experiment for a day, and see if on that day increased benefits were noticed.
In the clinical trails on Parkinson's disease, patients were given a pretty high oral MitoQ dose of 40 or 80 mg per day for a year (MitoQ did not show any benefit for Parkinson's though; but I understand that N-acetyl-cysteine is the antioxidant par excellence for Parkinson's).
The cost of MitoQ appears to be £0.58 per 5 mg pill.
EDIT: I'm always bearing in mind that in the Gulf War Illness study with ubiquinone, they found a lower dose to be more effective.