First I drilled a 3/4” hole with a step bit.
Then I got out the largest Greenlee punch I have.
And my hydraulic driver. One of the best tool scores of my life, I paid $7.00 at a yard sale. Look at the price of a kit on Amazon.
Assembled through the 3/4” hole. A little easy pumping…and the punch makes the hole.
Releasing the hydraulic pump.
The hole and slug. This is a lot easier than using a hole saw.