Okay... The model is actually appearing in PCS2 after export. It's just very small [0.33m]. You apparently had to rescale it somehow during conversion process. In Object Mode, select your detail0 and find Scale option on your right bar:
Set all three values to 1. All was set to 0.010 in your file, so Blender is applying different scaling value when you try to export it back to PCS2. Is you want to use it to rescale it, type your scaling factor than use Shift + A than Rotation and Scale.
Also note that your model have some holes. Apparently you removed too much of the original mesh to fit Uhlan cockpit to it. You may need to redo this. Use the Knife tool to make proper space for your cockpit [K key].
Okay, I scaled the model (including the subsystem, weapins, and the supplemental stuff) as instructed. Sadly the model still dosent show but has the weapons show. (See attached pics)
I noticed on the PCS2 I tried to type the textures from both the Izrali & the Uhlan. However, none of em are higlighting their respective sections. Maybe i am doing the "reassigning textures thing wrong"? (Shrugs)
Would like to know what you think I should do.
[attachment stolen by Russian hackers]