Lee, with some delay, I'd like to thank you for your answer.
After looking at some reviews, here is a short summary of problems with the Border model F kit (these problems were identified in other reviews and by Lee):
1. engine louvres (they both are rectangular, where one should have a chamfer, compare Tamiya's old D and new F kit)
2. the back part of the turret roof is too thick (portraying later, armored versions). If I understood posts on FB correctly, these problem should be rectified in later productionruns.
3. the barrel cleaning rod should consist of 2 bars, but comes with 4 for longer barreled guns. It seems that the 2-bar rod is in the kit, but without the required "head part".