I have read several posts over the years about all ranks crossing the bridge to the next rank. It can be exciting for the scout, but it doesn't seem (to me) to be much of crossing over. As a CM, I created a bridge that all the Cub Scouts could help build (each rank puts together a single step level (2x4 boards and wood pegs) of respective color (orange-tiger, gold-wolf, blue-bear, green-4th grade Webelos, red-Webelos leaders or non-crossing Webelos). We tried to make the crossing over of the Webelos to Boy Scouts special to everyone in the Pack.
I would try to make advancing to the next rank level special without using a bridge. We used to give special neckerchief slides as they advanced (use polymer clay with Tiger/Wolf/Bear paw print or an arrowhead for Webelos). Giving the next rank neckerchief is good, too.
I prefer the bridge for crossing into Boy Scouts. Using it for all ranks does take away from the meaning for the Webelos-to-BoyScout crossing.
scuba diving (with manatee), woodworking, camping, and lots of new hobbies through scouting