Support Star receipt printers with QZ Tray
The new QZ tray receipt printing in 7.8 is a great "leap" forward for Leap printing. However, it does not support Star receipt printers, and you cannot add support for them via a configuration of QZ or within Leap.
Since Star receipt printers are supported in Polaris: https://iii.rightanswers.com/portal/app/portlets/results/viewsolution.jsp?solutionid=160930969880949
This is a request that support for them be added to the QZ Tray receipt printing.
PS You can switch Star printer to support Epson commands as shown here: https://forum.innovativeusers.org/t/star-receipt-printers-not-supported-in-star-line-mode-with-qz-tray-switching-to-esc-pos-emulation/2566

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Daniel Messer commented
Almost all of the libraries we work with use Star printers. Indeed, if we're asked what kind of printer they need to buy, we always say Star, specifically we recommend Star TSP100III futurePRNT device. Polaris Leap and the Staff Client have always played well with the Star printers, so it's absolutely vital that the new ExpressCheck and QZ Tray do the same.