I have a Shimano Sojourn with a locking collar to hold the reel in place. I notice at times that the collar will back out slightly and make the reel wobble. Is there a way to make it more secure? Also the metal collar will scratch the reel foot when I tighten it down. Is that avoidable?

 

Here is a link to the picture of the locking collar for the Sojourn rod.

 

http://fish.shimano.com/content/fish/northamerica/us/en/homepage/Shimano_Product_Page.P-SOJOURN_CASTING_17.html

Just found a vid on Youtube. He suggested using shrink tubing. Looks like a cheap fix.

A layer of tape on the reel foot should snug things up. 

1 hour ago, Delaware Valley Tackle said:

A layer of tape on the reel foot should snug things up. 

   ... and if it doesn't, put some duct tape or USPS packing tape on the locking collar.     jj

The thread system on the Fuji type threads are square and don't they don't jam on the metal nut, not surprising since they use the same pattern for all their reel seats. The original jam nut reelseat made by Wiebe decades ago had round threads and the jam nut would **** and lock against the thread as they walked up the side of the round threads. A 40+ year old design used on the higher end G Loomis, Lamiglas, etc. rods of the day  Gary Loomis still uses the design on the Edge rods last I handled one.