It could. I can’t remember the exact weight but this roller ended up being around 50 pounds. So kinda hefty. But a spring would help it maintain contact.
Thats tough. My intent with this video and the building video were to demonstrate how to diy. There are so many variables in different mowers that I feasibly wouldn't be able to build one without needing to invest a lot into getting other mower schematics. Not to mention shipping will be killer. A google search for striper made for your mower might yield some good results from commercial companies. You can always ask questions about building your own too. Some versions are very simple builds with good results. This would be the most complicated version only due to the planning stages.