in dire need to handsplit some stones from kasota, some I need to break at a 90degree angle then reinstall some of it. A total newbie to this and learning from mere experience is not playable card for me right now and so im seeking some advices and tricks to do it. the stone is about 6in - 7in deep and from 2in-7in tall. as much as possible i wanna do it squarely but leave it rough looking. help pls