It's always fun, crawling under the sink, to reinatall all the drain plumbing.
Even more fun as you get older. Methuselahlistically older.
This is almost what I wanted, with the new garbage disposer, and the drain plumbing rerouted to leave more space between the floor of the cabinet, and the plumbing, so that I could store far more 'stuff' than I'll ever need, or use, or even find. Next time, I'll get a shorter disposer that doesn't take up so much space. This is what existed under the sink, before I started. It's the same red bowl. The next pic shows that I have lots more space to store 'stuff'. This is the new drain plumbing with the old disposer, that crapped out, not long after these 2 pictures were taken. The comparison, with that same bowl, shows that I can pile stuff much higher under the sink. Here's (actually an old disposer) With the lever, and rope, and chock that I made to help with the installation. The hardest part of installing a new disposer is holding it tight up against the drain, so that you can tighten the nut that holds the disposer to the bottom of the flange that's in the sink. With the chock inserted into the disposer, you can use the lever to hold it up fairly easily. Now, you're ready. Remove the old disposer, and strainer flange and related parts, and install the new one, with plumbers putty so it won't leak. (fairly often, you can leave the old flange in and just reuse it. They're pretty standard.) Now's the fun part - crawling under the sink. You want to become 40 years younger, and grow 2-3 extra arms (or get someone to help). Put the new disposer under the sink. Put the chock through the drain, and into the disposer. Lift the disposer up to the drain, and then hold it up tight while you tighten the nut. Then you re-do the plumbing, but that's a story for another time.