I get bases that partly fall apart after being pasted.
Also they cannot be undone.

I've seen this happen when you have christmas lights in the file. Remove the lights and it should paste.

Ok. This is interesting.
I will have a look for that.
Thank you.

how did you get it to work?

getting this erroru

Error while compiling: CopyPaste.cs(368,40): error CS1525: Unexpected symbol `end-of-file'

Plugin works fine for me except the described problem.

@kleementin could you please give me your .cs file