Now that Galaxy Tab 7.7 is out of warranty, it makes sense to install TWRP on it to gain access to install custom firmwares and ROMs on it so that you are able to get onto latest version of android. To install it, you will need mobile ODIN or ODIN on computer and we recommend going for the latter as it is more safe.
After having TWRP, you will also be able to enjoy all sorts of hacks including multi window mod that lets you enjoy Galaxy Note tablet like functionality on your tablet.
So there you go – you now have latest version of TWRP which is v3 on your Samsung Galaxy Tab 7.7 tablet. This will definitely add an extra layer of functionality on your tablet.