Ok, I try to address the questions.
1. I would defenitely prefer the A5/A6 set up. The A4 has a ballistic hole where the optic is. It is not that there is no armor protection, in fact there is a big block of armor behind the optic, but the channel were the gunners sight is connected to the optic is a weakpoint.
2. The advantages are not only the improved turret armor (BTW I would prefer the added hull and turret armor like on Leos of other nations) but also that the new optic, besides closing the ballistic hole, gives you the ability to not only use the TCs periscope but also the gunners sight when standing in a hull and turret down position.
3. Ok, I see I answered this in nr.2...
4. Parts of the pocket are filled with the cables and optical connections to the new positioned optic. Tests with Greek Leopard IIHEL showed that a round fired in a very limited angle can still enter the combat rom via the weak point if the add-on armor is penetrated. IIRC one out of more than 30 rounds penetrated. Still very good but the problem was adressed and seems to be solved now.
5. I think I adressed it in 1.
In the end I think the upgrade from A4 to A5/A6 (Especially A6) adressed a good portion of the needed upgrades. But I think it is a shame that other countries went the whole way and nearly added all the available upgrades.
What is needed for the german Leos is:
- An APU. Don't having an APU is insane these days.
- Increased hull armor. Especially when one thinks about the unprotected ammo in the frontal hull.
- Battlefield management system. This is defenitely needed and should be integrated into the already established management system in use with the
Bundeswehr.
- Increased top attack armor. One of the minor points but would still be nice if one has to cope with enemy bomblet arty threat.
- New sight. Also a minor point. And more important than a new TI (The old is still good) but a new daylight channel which allows for something like x4 and x12 instead of x12 only.
In the end the Strv122(123) as everything I want to see except the L/66. And adding it is not a problem and not that expensive.
I also like the PSO ideas and IMHO the
Bundeswehr needs a pool of these vehicles which are not in use with a unit but are deployed to oversea missions if needed.