Here's my current amount of GSE.
These are (almost) all 3D printed, and will be used in my upcoming diorama.
They still need to be painted... which is something i'm really looking forward to do!
I currently have: Narrowbody aircraft stairs, conveyor belt loaders, buses, fuel trucks (both semi trucks and conventional trucks), tractors, baggage carts, Volkswagen Kombi vans, pushback tugs and cargo box trucks. All based on 1980/1990 era GSE from Brazilian airports.
These were all printed by a friend of mine. Most of the model files were found on the internet (3D Warehouse website mainly). Some needed adjustments.
I still have more to come: catering trucks, stair trucks (for widebodies) and more cargo loaders are already in the pipeline.
I also have a few general aviation aircraft printed in 1:400: Cessna Citation, Skyhawk, King Air B200.
Here's a full overview. Sorry about the image quality. These were taken in a hurry.
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These below are Herpa 1:500 GSE, which I decided to keep. I used to collect 1:500 and had a diorama... I have sold off all my 1:500 GSE except these!
I believe they can still be useful even for 1:400 models. They don't look awkward when next to 1:400 models. The cargo loaders are actually a bit oversized for 1:500, so they simply work great for 1:400!
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Here's the GSE next to some 1:400 aircraft:
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