I'd prefer to get rid of it all, have an issue, then need to rebuy it and install it all at significant time and expense. This is the way. But hey, if you change your mind, just hit me up and I'll ship it all out to you.I'd still keep them around unless you sell the car. Part of my thinking is that if we still can't dial in the alignment to spec with a used set of control arms, then there's that worry that maybe there's another problem.
I almost made the same thing happen with a garage door opener install. Unit was defective but since it would have been my first install, I'd have blamed myself instead of the machine, and wasted hours of time. Thankfully I just paid a pro and he dealt with it.