Doubt about traktor internal mode and VMS4

I wanted to know if the VMS4 and traktor can be used in internal mode, just use the VMS4 as a MIDI controller and a sound card for master and headphone output only. may be already answered in the forum, but my English is not very good.

And Ean Golden says:

“The jog wheels don’t support scratching and pitch bending at the same time unless you use a protective rubber ring around the wheels which detracts a lot from its curb appeal.”


The rubber ring is a piece of high tech ? Why do not use the jog wheels for scratching and pitch bending at the same time unless the rubber ring?

Thanks