Thanks for all the comments. Several FISOs were involved in developing this, I just started looking at it when we were sourcing and setting up the printer.
The idea of presenting people with the strip - this is something we already do this with the hand written ones for student first solo flights (the airfield presents a certificate regardless of the school they are learning with), mounted together with the certificate.
We think we may print on a (duplicate) strip something like 'Congratulations on your First Solo!'