For the skins JG1_MiG-21Bis_Green Luftwaffe BORT, JG1_MiG-21Bis_Silver Luftwaffe BORT and JG1_MiG-21Bis_Tan Luftwaffe BORT it's confusing how to get your BORT number to display correctly (the last two numerals of your assigned number). I had to make a workaround of the hardcoded DCS bort system in order to make it work at all. Attached is a graphic depiction which is much easier than trying to explain it verbally. 

The "Not visible" can be any numeral. I generally use 0. So for my 441 Bort to be displayed as 41, I type in 104.

Thanks for the clarification, @Vonrd!

I've featured this post and moved it to the skins section.

All - the specific skins in question are now in our DCS paint pack and are outlined here (<-- click me).