Reply to Chroma caps-Akai Mpk Mini Akai Lpd 8

Hello
I have one question.I wanted to buy Akai Lpd 8 and I would use it to control FX but i seen pepole talking that knobs are to small so i thought on buying chroma caps but it doesnt say is it posible.
I saw some ppl used chroma caps for Akai Mpk Mini and by the look of these 2 knobs are the same http://cdn.mos.musicradar.com/images...100-460-70.jpg
so if there is someone who can just tell me if this is possible?