Thought I would use the vast experience base to help me make a decision. I just purchased an older CZ550 American Safari Magnum 458 Lott. The rifle is great and ready for some work to make is mine BUT I hate the bolt knob and bent position. My bolt action experience is with comfortable large over-sized “tactical” bolt knobs (on specialized stocks) that stick out from the stock much more than the CZ. It is difficult to get my large hands fully under the CZ bolt knob and I despise the hole in the knob and not just for the aesthetics but the opening's sharp inner edge is almost painful when cycling. A search of the Internet describes several gunsmiths offering different options. The questions I have center around making this rifle for field hunting use in Africa: Does just straightening the bolt arm increase the space between the stock to make it worth wile? If you know, does just filling the hole in the bolt actually increase the perceived size of the knob? Would an over-sized knob cause problems in the brush? (am experienced with the scope clearance) What is your opinion of using a screw on over-sized knob? It would be permanently attached Would it be better to have a new bolt knob/arm attached instead? I thank you for your help and willingness to share you experience.