That’s me and my Legion Go. Got a dock, wireless keyboard and mouse, swapped the backplate for a new one and got a full-size NVME adapter for it, although the last one is mainly just for keeping the wireless module cool as the SSD heats up a lot. However, the new backplate has extra cooling vents for that, too. Next is adding a heat sink to the new SSD.
I mean, this is neat, but I really enjoy the features of my original Legion Go. The removable controllers are just awesome, and it works wonderfully as a ‘I want to play my Steam games but I can’t be at my PC right now’ machine. I’ve been streaming to the thing since I got it, and it’s powerful enough to run relatively modern games on low-medium settings at 800p. I ran through God of War on it decently enough. Only downside is that the SSD heats up and can screw with the WiFi card directly underneath, but I don’t mind the noise from the fan because most of the time I’m using headphones with the thing anyways. It’s got USB4 as well, so I wanna get an external GPU dock eventually. As for now, a powered hub is doing great at essentially turning it into a console at my TV. The touchpad on the right controller is really handy for navigating Windows.
I’ve extensively used my OG Legion Go. Even done a few simple hardware mods to put a bigger SSD in it. I love the thing, and the only real complaint I have is that there isn’t enough RAM.