I'm working on an SFF build with copper pipes.
Since I have multiple bends on each line, I need to use elbow fittings.
This implies soldering copper, and I'm not really confident with it...
Have you ever tried any of the "solderless copper bonding" glues I've seen online?
They seem like a good solution, at least for water cooling...
There is a system for connecting copper tubing and copper fittings that does not use solder. Just google "Propress" for an example. Some places rent the tool or you can purchase one. Before I retired the company I worked for used this tool for a lot of copper fittings from 1/2" thru 4". It works very well, is quick and does a lasting job.
To avoid soldering I would use either a compression elbow or a push-fit elbow. But it depends on what the pipe is carrying (water or gas).
Useful tools include pipe-cutters and appropriate sized spanners/wrenches.