Roller stand for H0 models

50 cm. roller stand to test locos. Similar to one from aliexpress.
An alternative to https://www.thingiverse.com/thing:4583174 and https://www.thingiverse.com/thing:4646475

Additional metallic parts:

- [6x2x2 mm. washers](https://aliexpress.ru/item/32842754674.html?spm=a2g2w.orderdetail.0.0.62644aa6FbU8y6&sku_id=65149609261) (4 per bogie)
- [2x20 mm. iron shaft](https://aliexpress.ru/item/32967805012.html?spm=a2g2w.orderdetail.0.0.35524aa6WPApfT&sku_id=66573035811) (4 per bogie)
- [6x4x500 mm. stainless tubes](https://aliexpress.ru/item/1005003753877139.html?spm=a2g2w.orderdetail.0.0.4b6e4aa6WjOJkV&sku_id=12000027047866266) (2 total)
- [3x500 mm. steel rod](https://aliexpress.ru/item/1005003068344648.html?spm=a2g2w.orderdetail.0.0.2b4b4aa6q7Hd1g&sku_id=12000023775159186) (1 total)
- [4 mm. banana connector](https://aliexpress.ru/item/32879063018.html?spm=a2g2w.orderdetail.0.0.7ef64aa6hZOZ1l&sku_id=65573993789) (2 total)
- wires