I'm curious about your decision to use robotic arms. Why arms and not, say, (electro)magnets? Or perhaps both - they aren't mutually exclusive. Or maybe you are doing both...
Robotic arms are more general purpose, but we likely will end up doing both at some point (plan on testing both for our demonstration mission). The only downside to electromagnets is you need to pre-emptively install something on the satellite before its launched to make use of it.