I love the score machine. It helps so much with arthritic hands. Liked it so much, I have been recommending it to everyone I know who does stained glass. And I got a second one for backup.
These are so easy to replace, I love my score one
I find this tool to be very helpful with difficult cuts. The turning radius is limited, so it's for smaller pieces if the glass needs to turn.
I oil the wheel as needed and it cuts like butter.