What is more effective palms up or palms down?

I’m wondering what you guys think give more effective gains. Palms up or palms down?

Down. An overhand grip allows you to begin a jelq or apply a tourniquet grip much closer to the base.

I alternate grips of both base and extending hand within a session.

I don’t mind jelqing fully erect. Therefore, when flaccid, I start out ‘palm down’, which I think gives a better pull lengthwise (but this only works for like 20 strokes). When being more or fully erect, ‘palm down’ for my does not really trap the blood anymore. So I change to ‘palm up’ which no longer really gives a lengthwise pull, but (due to my tight grip) but tends to become an uli like of exercise, which of course works girthwise. ‘Palm up’ is so powerfull for me, that I had to take days off, due to ‘blood blisters’ on my dickhead - force was too strong, so the cells in my dick head burst - needs some healing time…

SEE YOU IN 4 WEEKS, I’LL BE OFF DUE TO A TRIP TO BRAZIL !!!! TAKE CARE EVERYBODY !!!