Update about noise floor with C3gs.
My C3g were noisier compared to my other tubes. Eventually I found out the static only comes out from one side. If I would to guess it may be the adapters at fault, will be ordering a new pair to see if it fixes the problem.
My plan was to switch the left and right tubes with their adapters to see if the noise will change. Then change the adapters to determine if one of the adapter really is the root of my problems. However, turns out the noise still remains in the left channel after my first swap. Was not expecting this. This may very mean it is my amp that was causing the hum. In quick intervals while the amp still warm, I popped in a pair of Voskhods in. Interestingly when I powered on the amp the noise floor was full on, then quickly dissipated leaving me with a dark background that I initially experienced.
Are there any LD I+ users that roll C3g? Now I'm not sure if my amp is bad or C3g was just not meant for it in the first place.