Installing Transgo HD2 Kit

I'm waiting on a Transgo HD2 kit to be delivered, going to install it later this week. Wondering if anyone has put this in their 4L60E? Hoping to get some tips or things that are good to know before getting into it.

I'm hoping this helps my 1-2 shift, but also wanting to lengthen the life the transmission. Also not planning on dropping the transmission to put in the springs, just working in the valve body. Replacing the EPC solenoid while it's open as well, my pressure test showed down in the 50s.