Ok, but here it seems we got the same information: that you can keep the shares in your KF indefinitely.
This is the key point for me, because if I want to sell in the future, it is because the stock has increased in value. And moving the stock out of the KF to another bank and selling them immediately afterwards would not trigger any big tax hit, whereas moving them out of the KF now would lock in a very low acquisition price.
I do not think it will be to complicated to find a bank to take over the shares in the future. My first bet would be Lynx, which works together with Interactive Brokers. But I will cross that bridge when I reach it.