Thanks for this info. I got the massive roll of Tesa for £10, and just taped up my new wheel early this morning. The 25mm goes edge to edge inside the 23mm (internal) rim perfectly, and as mentioned it is just like Stans although I felt it adhere to the rim better during application and slightly easier to use.
I’m following my usual process of leaving it all with a tube in the seat the bead and push the tape on throughout today and will go tubeless this evening.