I have 4.1 E and it has no problems at all i would say downgrade it

I'm interested in doing runs of this game but I feel that the rules need some clarification especially on the IL side of things because you could for example do mission 2 using 3 lightfoot scrolls or even more silly chameleon disguise (mission 8 Grandmaster item) and 3 lightfoot scrolls to get a ridiculously fast Grandmaster IL.

Another item which could be abused to get Grandmaster ILs is mission 10 Grandmaster item to reset enemy status.

My personal opinion on this is that you should only be allowed to use items attainable in single segment i.e no chamalion disguise until mission 9 and only 1 use allowed because you should only have 1, same goes for LFS on mission 2 because you should only have 1. This means that you could use 3 chameleon items in mission 10 (only applicable to Grandmaster% really)

Another query is about the Japanese version (shinobi gaisen) not the one with 2 missing missions. In the Japanese version the mission layouts do not become random until you have finished layout 1 (which is default) this is a huge disadvantage in mission 3 and mission 10 because you always have the archer shooting at you when you are trying to jump the gap / lava respectively.

Can we allow NG+ in Japanese meaning you would start a game with all missions cleared so that the run would be identical to US / PAL of course you would have to make item count in line with a new game to make it fair.

Sorry for long post, interested in opinions on these matters