On-orbit service assembly and manufacturing (OSAM) is perfectly suited for thruster systems which do not require on-board propellant. Read more about the program here: https://spacesecurity.wse.jhu.edu/2021/11/10/space-force-launches-orbital-prime-to-develop-osam-systems/ and https://executivegov.com/2021/11/space-force-announces-funding-program-for-orbital-technologies/
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