Just got an insider piece of info regarding last night.
I was visited by a friend who I noticed standing next to one of the Sifrei Torah. I asked him whether he got one, his response was that he didn't. He actually got to write the last letter.
In order to cut costs (not having to pay for 36 additional participants), they asked around who of the Shluchim happens to be a qualified sofer. My friend responded that he learned safrus and wrote a few Megillos, but isn't active. He was told that the only requirement was knowing how to handle a Kulmus, so he was assigned. In order to save time on drying, there was only a very small portion of the last Lamed left to be filled in.