Well, I do have the 7001 and the 7320 (wrong#). They are now riding on Atlas Chassis and are DCC. The 4012 and 4034 are real Unicorns!
My idiot list says I have 2 x 4012 and 4 x 4034... were they hard to get when new or are they now? I haven't looked for them on ebay in years. Also have a 7001, 2 each 7074 and 7320. Like the TLT RS-18, I figured we'd never see these again so I bought my fill of them when released, both CN & CP.
I've thought about putting Atlas GP7/9 chassis under them when it comes time to DCC them (should I ever have space to build a layout)... is it major surgery?