The trick for no discolorations is to slowly up the pressure and slowly down the pressure!
I got my discoloration from 2-3 pumps where I pumped with the [words=https://officialhydromaxpump.com/?uid=6&oid=2&affid=98 ]
Bathmate[/words] fast and hard in a hurry.
Blood moves into tissue very deeply when you hurry the pressure and it cant escape when you let the pressure go fast. Its then encapsuled in upper dermal layer and gets only slowly reabsorbed(years).
Im talking about strong discoloration..cause you will always get some with pumping/clamping etc.