Reply to Traktor S4 Headphone knobs

Hey guys this is actually my first post on here (never had to post to find the info i needed) but I recently purchased the Traktor S4 and am pretty satisfied all around besides one big gripe, THE HEADPHONE VOLUME/CUE/MIC VOLUME KNOBS FEEL CHEEP! I've seen a lot of guys replace EQ knobs with Metal Machined ones. I believe that would not only look great but add a heftiness that the great controller lacks. Anyone know of any metal knobs that would fit and if replacing them will be difficult or do they just pull right off?

Thanks!