I always seem to get that sick feeling every time I start to put a roller jewel into the table, but after many lost jewels I have found by placing your roller table into a combination tool with the D slot pointing out of the fingers and laying the jewel flat side down on your bench mat you press your roller table down slightly into the mat, even with the jewel and using a large needle just push the jewel and it goes right in. Give it a try works every time for me