Perhaps "borrowed parts" is an arguably more apt description than "retool." Cos yeah, Ectotron does share the same upper arms and upper legs as CW Hot Spot and that's it. Everything else on this toy is new. And the borrowed parts haven't been retooled either (they are identical to Hot Spot's parts, just beige instead of black).

P.S.: I mean "borrowed" in the way that languages "borrow" words from other languages, not "borrow" as in meaning that the borrowed thing needs to be returned.