S4 and VCI-100 knobs and fader caps
If you were curious the VCI-100 knobs and fader caps fit on the S4. So by proxy that means the DJTT knobs also fit. It’s a little looser fit, but they definitely work.
Now what color am I going to order? 
green!
I’m thinking White since green is sold out. 
again??? they were back in the other day!
Yep, at least the form on the store says they are. That may not have been updated though.
I tried to pull of some of the knobs that you can push down and couldn’t get them to come off with a decent amount of firm tugging though so they may not get changed.
I love my yellow knobs! go for yellow!
white looks more “clean” tho.