[Radoye]

You should be careful with the /U and /R packs, they aren't really true versions only optional addons either applied in the factory (/U) or as field-mod kits (/R) - and it is even possible to have multiple kits applied at the same time.

So you could have something like Me-109G-6/U2/R3/R6 (U2 - GM-1 boost, R3 - droptank installation, R6 - MG151/20 underwing gondolas).

Some of these options could warrant a new version, but others would be best dealt with as additional loadouts...