[Wulfmann]

When one makes a new unit or a new group and then saves it to his own SCRXXX.mis file it defaults to unit #1 unless you first name it something else (at least in the group name) Even the single unit can be easily added manually by opening your new SCR, changing the number to a new one that does not overwrite an existing one.
When I merged the first SCR Sperrbrecher (Unit 1) it eliminated a static U-Boat at Lorient which I then retrieved from a stock GW SCR and added to the end of the SCR making it the last number.
What I think is easier and safer (let me know if you have a better idea) is to make the unit in a new SCR then change the number and just copy and paste it in notepad to the game’s SCR.

As for doing it in the RND.mis file when I save it to a new RNDXXX.mis it does not show up when I open that RND so I must be missing a point that is different than the SCR.

I have noticed a bunch of British minefields and wonder why there is no mine map (or is there and I am just ignorant) as I have often read where Kaleuns get new mine maps with each patrol.
Wulfmann.