I do a ton of fixing up of knives so I like to consider myself a mild disassembly expert. Maybe I should make another post...
Seki lockbacks bigger than the delica are torture. Taichung comp locks are a little complicated and the tolerances are really tight, but it's not to difficult once you get the hang of it. Golden lockbacks are simpler than seki ones and the spring tension tends to be lower so they're not bad at all. Ball bearing locks take maybe a little more goofing around, but since it's literally just fitting that one piece next to the blade it's really easy once you've done it once or twice. Framelocks and linerlocks are braindead easy. The scales on my Spyderco fixed blades don't uh, come off? Can't speak for golden comp locks since I've never taken one apart.
Any of them of course, with some experience, aren't too bad. You can take the scales off one by one and just make sure everything is in place, you can zip tie the lockbar open on the seki models if you're only doing a bladeswap, etc etc etc. If you aren't confident in taking apart something I would just not do it, or start on the cheapest model. It's super easy to mess up some of the internals on these knives.
I require more lc200n and thinner grinds
Current collection: Watu, Spydiechef, Native G10 salt, Waterway, K390 Ladybug, Caribbean