Buy a loco some track and give it a try...that is how it got me...and I still keep some of that huuuuge N scale around.
I've just seen this now... Gerd, you're a true artist, crossed with a watchmaker. I have an HO P2K SD7 - also CB&Q - and your Z scale version is amazing. Allow me to drool in respect before your awesome talent... PS we need a drooling smiley...
I maybe getting in on this one kind of late; but then again is it ever to late to appreciate a piece of art like this; No it's timeless and so is the appreciation of it. Nice modeling to say the least Gerd Glen