Ask HN: I'm a founder who wants to take back some control

I founded a tech business around 10 years ago. A few years ago, I took a bit of a step back and installed a managing director while I took a 'head of technical' title.

Things have been going very well and the MD is great, but I feel I need to take back a bit more control in order to take the business to the next level.

In terms of how I can achieve this as painlessly as possible, any and all advice, anecdotes or input would be greatly appreciated.