My 2 cents - the hollowed out knob is a good size. I wouldn’t change it for a different knob unless they can make a bigger hollowed out one (I didn’t even think to ask if they could). Mine is getting spun up into a lightweight walk-around rifle that will be smallish compared to my other rifles with bigger bolt knobs, and I think the standard AnTi knob will be perfect for this platform. I have big hands as well, and I didn’t have any issues with it when playing around with it for a few hundred cycles.