The plan with your friend sounds reasonable. With regard to the more technical question, I guess it's a matter of whether you want the short(er) or the long answer. The short(er) answer is that I would estimate that the use of 'audiophile' cables that substantially depart from the design and construction of ordinary commercial-grade designs would generally correlate with reduced (rather than improved) performance if any change in system dynamics were observed at all. However, equipment destined for working primarily within audio-band frequencies, at least those with well-designed power supplies, should generally be able to handle less than ideal conditions with regard to the design of your power interconnect. So, you may be able to use the device pictured without degrading the performance of your equipment to a degree that would be noticed in ordinary use cases. As for the longer answer, I'm not sure I feel like writing it. However, probably the most germane aspect of that to note would be that the "weakest link" aphorism is apt to mislead intuition and mischaracterize the dynamics of systems, so I don't recommend it when thinking about how to improve the performance of one's audio equipment.