Can I change from twist knobs to levers on Rocket R58 steam by James DiStefano | Feb 2, 2016 | News | 0 comments Can I change from twist knobs to levers on Rocket R58 steam I thought I saw mentioned somewhere that you can swap the knobs for levers for the steam and hot water. I cant find it again though, do you know if its possible for a Rocket R58 and if so what parts to get. more info… Submit a Comment Cancel replyYou must be logged in to post a comment.