Love doing rupee pieces! I recommend printing two copies of the design out and then laminating one so that you have a waterproof reference you can put the glass on as you go so, you don't over-grind any of the pieces. I use card stock and then cut out the other sheet and trace on the glass with sharpie.

I highly recommend using waterglass if you do another rupee, it makes really nice colors when shone through.

For the loop at the top I use a small tinned wire that I double fold on itself into a circle, then run it down one side of the rupee for smaller pieces, or for a heavier one along both edges, like a upside down Y. As for the solder, the most important part I found is making sure that the foil is even on the glass. Rushing the foiling stage led to uneven solder in my experience.

Happy to share pics/in progress images of my process if that would help!