Welcome to the brotherhood, brother. Yes, you can indeed increase your
hanging length, or dropping off the testicles. Increasing the testicles size, that, I cannot provide a solid answer.
When you pump your testicles, you stretch the skin around the testicles, and put a stretch on them over time. You can do the same thing with the testicles straps that you can wear all day long and slowly stretch them down. You can add
weight to the
strap and increase the amount of tension to cause the testicles to drop along with the stretching of the skin.
But to increase the testicle sizes through pure pressures alone, the success is as slim as making breasts bigger just by pumping. You can trigger a growth phenomenon, but that's very rare, as rare as 1 out of 10,000 people.
Using botox to increase the gonads, I'm truly hesistant to even confirm that. When using botox, you can trigger swelling due to macroorchidism, where your gonads suddenly grow into massive sizes. I've seen cases where botox triggered abnormal cell growths, which lead to testical cancers instead. But overall, botox is a poison that can trigger abnormal things. This is why botox and testical growth don't go hand in hand. A rare few will benefit, while the rest will just suffer.
Human growth hormone, or HGH, does have a 75% chance of abnormal testical enlargment. Direct injections can indeed cause the growth. This was done quite a bit in the 70s and 80s. It got stopped as HGH became restricted for usages.