Dell 1250c / Windows 10

I have installed the Windows 7 drivers successfully on Windows 10 in the hope of geting full functionality. However, although normal printing seems fine, I am having issues printing in booklet format. The output is not scaled correctly (the text seems to print full size instead of scaled). Has anyone else come across this problem and ideally a solution?

Dell claim that this driver should work under Windows 10. The Microsoft driver has minimal functionality and doesn't support booklet at all.