Hey, John!
It seems those of us with low hangers belong to an even rarer fraternity than those to whom this board is dedicated (i.e. luxuriously long dongs are more common than large, low swinging balls!)
Mine hang about 7" and are individually about the size of jumbo chicken eggs. It's hard to measure their total circumference because the left one hangs below the right one - the little monsters don't take kindly to being trapped inside the measuring tape - but they are about 12" around, give or take.
Being a show-er and blessed with a larger-than-average erection, I can empathize with most of the posts on this board, but the balls present their own set of problems.
There just aren't enough of us around to have a large testicle group or board of our own - it's been tried by one of the members here and less than a handful of us signed up.
As for the amount of ejaculate being determined by the size of the balls - that remains to be scientifically determined, I think. There is an average amount pretty universally agreed upon, that being about a teaspoonful. So some guys will put out less, some more and all are perfectly normal. I, for one, have to be aroused for a good half-hour before I start any precum, but it is copious once it starts - and the final ejaculate itself is quite a bit more than normal. I don't think it's due to the testicle size, though. Just the luck of the draw.
Pecker