tube noise issues in 5f1. Speaker issues?

Guys...I've been struggling with tingy/rattle/vibration type noises in my new 5f1 amp turned up in mid-volume range. After a very, very thourough investigation of all solder joints and assembly, my initial culprit was the Sovtek 5y3GT, so I replaced it with a GZ34, and it eliminated 80% of the noise. However, I'm still getting noises, which seems like it is from the 6v6. I took out the chassis and placed it above the cab for a "head" type position (vs in the cab/combo), and it seemed to eliminate most all of the noise (oddly enough, a tingy noise comes back when I play D chord on certain strings --weird, but that could be a bad 6v6 tube).

So, I guess my question is, coould I have some issues in the combo set up with the magnetic properties of my speaker with the tubes, causing these harmonic issues? I'm using a Jensen Mod (10"- in a larger cab designed for the 10" speaker). Does the type of speaker or a close distance from the tubes affect this tube rattle/harmonics like this? Is there a shielding I could put between the speaker and the tubes to help?

Any thoughts or ideas here? Thanks so much!

Yeah kinda sounds like a rattly tube issue.
Make sure all bolts etc. are tightly secured too.
Have someone else play your guitar to trigger noise. You put on an oven mitt and hold tubes. If that eliminates it, you can try those o rings.
5y3, 6v6, and 12ax7s are all tubes you may wanna bulk up your stock with :)