I have two of those handles, mounted on Zillions. Daiwa knobs do not fit. They are 4bb equipped. I know the handles are lighter than the stock, riveted handles they replaced, but, with the reel mounted on the rod, the difference is imperceptible. Actually, with the the reel not mounted on the rod, the difference is imperceptible.
The knobs are very flat and wide. I'm a big fan a Daiwa cork knobs. I like the smooth feel. I do not like knobs which have any texture. The Lew's knobs are very nice, in my hands. The shape is a little weird at first, but two casts in, they feel good.