A key ingredient in this transition and being successful in it is trusting in your team.

We've gone from 3 to 10 in last year and realizing everything might not happen my way but will still be done well required some mental adjustment for me. But the ability to do this was purely a function of trust in the people on the team and their instincts, judgement, skills, etc. (note: the mental adjustment remains a work in progress. Maker tendencies are not easy to lose)