220v Plug End Replacement for Equipment

[[.. munch ..]]
Your approach _is_ entirely rational and reasonable.
One thing I would suggest considering. "safety cords" (aka 'strain reliefs') across the connections, _whichever_ kind of connector you end up using.
Where cords are subject to movement, twisting, etc. "Twist-Lok" connectors _can_ come unplugged unexpectedly. Their primary 'advantage' is that they do *not* disconnect when subjected to a _straight-line_ pull. The secondary advantage is that they tolerate _large_numbers_ of connect/disconnect cycles better than "straight blade" types.
Something as simple as a piece of string/twine, knotted around the cord just behind the plug, and attached to a hook next to the outlet. Makes it _really_ difficult for the plug to 'fall out' of the socket. <grin>
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