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Looks good, and rather huge!
I put HO scale metal wheel sets in it but I need wider radius track because it won’t go around 22inch HO curves!
Eugene that is too cool, great looking model. I was going to ask if it was able to be hooked up to an HO train set when I saw your comment. Once you get the curves worked out you’ll need a period appropriate engine and a bunch off flat cars hauling HO scale armor! That would be a sight - A moving diorama [:)]
I was going to use this brass GHC 0-6-0 Switcher that I painted in US Army livery to represent a captured Siege motor that was brought to the U S for testing after the war .I put a Kadee #5 knuckle coupler in already . 
Again - very cool.
Thanks!I think so too!
Yes, very cool! I’ve seen the box before but I think this is the first time I’ve seen the kit built. Monster of a gun!
Very well engineered kit fit was great and there was no flash at all on the parts.
Outdoor pic of the engine. 
So was this operated only from a rail car? I see tracks on it but not the other vehicles and not sure how they can adjust azimuth. Looks great.
That really looks good,just don’t point it at the house.
GlennH, the mortar itself is SP, a crew dismounts it from the rail transports and it slowly trundles into firing position.
In practice the Germans would run a spur line to the general area wanted to dismount the vehicle from its train transport cars. It would trundle, slowly, to its firing position (the proportions of the tracks actually make steering extremely dificult due to the LxW ratio).
The Germans went to the trouble of cobbling up a PzKfw IV variant with a box superstructure to tote spare ammo to the beast. Which was a lot of work to only bring 10-15 rounds to the beast rather than a railcar load. And using a (semi)armored vehicle to bring ammo to something placed 3-5km behind front lines suggests a lack of practical thinking at upper planning levels. After all the crew was completely exposed to “work” the weapon.
The Germans were aware of the track radius issue too.
The engine looks cool too!
I’d think the thing would be a big fat target for air support like Il-2 Stormoviks…
True! No way too move it quickly!