Good day all
The crystals are set in 1mm and glued in although you could leave the ends plan, square or domed.
Crystals are on ebay they are 7.1mm flat back.
Will they sell ?, only time will tell. I have had some interest in them.
You could just press the cap end in but the Slim Jims I made are 15mm long at the cap end. Without the extra length I think do not look as well.