My badger 5 needed to be replaced all the way back to when I first bought my house years ago. Previous owners abused it, home inspector said it was rusted. Surprisingly, after I explained the unfortunate failure, insinkerator offered me a 20% discount on a new evolution model, a true testament to their commitment to keeping customers, whether you’re a hand me down owner (like me) or a long time loyal customer. It’s nice to know that you can count on them to stand behind their products and keep their customer base! The overall installation would have been very easy if I had just planned to replace all the chrome pipes from the very beginning. The evolution compact is NOT the same size as the badger, and I knew this going in based on the specification (6” down from kitchen sink, but only 4” down from the disposals main outlet, which is just about a 1/2” too short). If you are replacing a badger, prepare to buy an 6” extension pipe (1.5” diameter) if you are planning to use the 90 out of the new disposal. It was only short to the p trap a matter of about 1/2” or less, but I wanted peace of mind and no leaks, so I simply just cut the additional extension pipe down to 4” to make everything work, with plenty of pipe inside each joint. Just when everything started to line up, the main extension pipe attached to the p trap broke because, you guessed it, it was rusted out. Glad it happened since it caused me to purchased a clear p trap package and a 1.5” rubber coupler so I could replace all the chrome pipes with plastic PVC pipes. Had I just done this from the start, I’d have saved myself so much time and effort. I also opted to remove the original bracket and install the included mounting bracket since the original was old, dirty, and yep, rusty. I used plumbers putty around the sink opening, you don’t have to press down since the screws underneath will do this for you, but I did it so I could remove some of the excess putty before tightening the sink bracket down. I laid the new disposal in the sink to weigh down the new drain piece while I installed the rest of the bracket pieces underneath. It was a pain to get that metal ring installed to hold the bracket up against gravity, but I did it after leaning inside the cabinet. The evolution was fairly easy to install, but it was very difficult to mount on the attachment under the sink because I was working against gravity. I kept getting the front and one other tab to line up, but that third tab in the back was a real pain until i crawled inside the kitchen cabinet and got an easier angle on it to get all three tabs lined up. Once you get them lined up and started, its easy to use the included hex tool to rotate and lock the disposal into place, which also makes the watertight seal to the sink. The best part is that after you lock the backets into place, you can still rotate the disposal!! This design makes it extremely easy to line up the outlet with your p trap or other pipes, really great!! I did the electric wiring before mounting the disposal to the sink bracket, it’s MUCH easier whether you have a plug or wire it directly, but make sure you have some slack to work with as this will help when you lift the disposal to the bracket and rotate it to line up the drain pipes. Once the disposal was mounted, it was fairly easy to line up all the pipes and tighten everything down in preparation of the leak check. I only had a few drops on the rubber coupler on the main drain, which had nothing to do with the disposal. A few more turns of the screw tightened up the rubber seal on the pipe and that was that! Love the clear p trap, you can see exactly how the water runs down the drain and know if anything is wrong before it causes a problem! This machine is POWERFUL! It surprised me when I first turned it on because you could tell it had higher HP, (i left the cabinet doors open), but at the same time, it wasnt nearly as loud as the badger. I cant wait to send food scraps down this new unit and see it all flow effortlessly down the clear drain pipes. Really worth all the effort after all these years, just wish I did it sooner!!