Kobo plugboard setup?

I have just got a Kobo Libra2 to replace my ailing Kindle, which after only 2 years has arteriosclerosis of the battery. I have a plugboard for the Kindle which replaces "&" by ";" in the author_sort list, so both authors are recognosed when there are multiple authors; and another one to put a checkmark and space in front of the title for books which I have read (encoded as rating = 5), so I can tell them apart from unread books easily. I put them in a separate collection so they weren't shown in the main book list if I sorted by collection.

I tried uploading a few books to the Kobo without a plugboard, but only the first author in multi-authored books was recognised. I tried the same plugboards as the Kindle:


which works fine, but I can't figure out what to do with the authors. For the Kindle I used

The space after ";" is not really there, but without it "; )" displays here as ";)". This takes "W.C. Sellar & R.J. Yeatman" and turns it into three authors: "Sellar", "W.C. ; Yeatman" and "R.J." I tried using a comma instead of a semicolon as a separator:

But then I just get books authored by some guy called "PLUGBOARD TEMPLATE ERROR" :chinscratch:

So, can anyone tell me what I need to to for multiple authors?

Also, is there a way of automagically marking books on the Kobo as read, so I can just filter out the books I've read rather than using a checkmark?

Any suggestions gratefully received!