I recently got a used in near perfect condition YSL-684g medium bore tenor trombone and I was looking at it today and saw that around the curl on the bell there was solder covering the gap and I like that its there because now I cant get polishing cream stuck in it. I just want to know if that is normal for professional horns to have. :bassclef:

Some professional horns have soldered in bell wires. Others don't. Yamaha usually has soldered bell wires. I'm not going to go into a discussion of the pros and cons of soldered bell wires -- it's been discussed elsewhere here.