It just dawned on me ...
, I should have put two and two together ...
der lügende Holländer ... To my defense, I was doped this morning with anti-allergy drugs and had my mind on other things. But how rare this thing must be crossed my mind a couple of times today and I might have succumbed for even five digits ...
You know what made me think twice? That you monikered it Thunderbird X. If this thing had existed as a prototype, I would have expected them to retain the Firebird X (XB?) designation.
Good one, Rob, you broke my heart twice, first by having me decide against it, now by my belated realization it doesn't even exist.
Böser Holländer!