The optical drive had stopped working, and I was trying to breathe new life into the 2007 MacBook
Repair went great! In around an hour I had it opened, replaced, and ready to go. I used Carbon Copy Cloner to clone the existing drive to the new SSD, and then booted from it.
Boot time dropped from 35+ seconds to under 20. Transfer rates and app launching greatly improved with M4 SSD.
There are LOTS of screws on this iFixit. Be sure to keep track of which ones go where. Also, I was left with about 2 screws at the end. Oh well!