Nice gains. An Uli is a simple squeeze. Get 100% erect, grip at the base, kegel some blood in, and grip hard. Your penis should be engorged 110%. For a more intense version, pull the grip up a half an inch or so.
Vets aren't the only ones that know what they are talking about =)
A squeeze involves doing an Uli while using the OTHER hand to compress the penis - an Iso Comp Squeeze is an example of this. A Horse 440 is another squeeze. Pulling the grip up is just an option during an Uli or a squeeze to increase the pressure, or to keep the pressure on as blood flow is lost in an extended hold.