If you do not hear improvement with Nobsound springs I will be shocked. If you do not hear even greater improvement with Townshend Pods I will be even more shocked.
Just so you know, I have asked so many manufacturers so many questions like this over the last 30 years I have lost count. Except for one number: zero. The number who have told me their product could be improved.
Understand? The last person you ever ask about making something better is the one who made it in the first place. They will all tell you the same thing.
Nobsound are cheap. Townshend are good. Try one or the other, you will see.