Infill percentage by itself doesn't do that much for part strength. Helps to add an extra layer or two to the shells and increase infill overlap percentage to 50%+ to make sure infill is strongly fixed to the outer layers. Nice solid looking parts though.
Another print done. 30% infill so should be nice and strong.
Thingiverse
https://www.thingiverse.com/thing:3205139/files
Steering wheel holders for @Soul