Just drill it. The hole saw bits are dirt cheap. There's a hundred videos on youtube for how to drill a glass tank.
Buy your bulk heads first. A 1" bulk head does not fit in a 1" hole. FlexPVC dot com is a great place to purchase bulk heads cheap.
Richon Tools dot com is a great place to purchase hole saws for a couple bucks. They are from hong kong and take a week or 10 days to arrive. They are sent in tiny boxes with chinese stamps. But they are cheapo as hell and they work perfectly. Buy the diamond coated hole saws in the correct size for the bulk heads you select. They come in every size with increments in mm. I always buy 1mm larger than suggested by the bulk head manufacturer.
Bulk head installation 101:
Gasket goes on the INSIDE of the tank.
Hand tighten carefully.
Wrench tighten 1/4 turn
STOP!!
Leak test.
Here is a bulk head flow chart that you can use to size it all.
Bulkhead Flow Rate Art
You indicated a 55g tank and a 29g sump. Typical sump movement is 3x -- 5x the tank volume per hour. So, you want about 90 - 150gph going through your sump.
But you want at least 10x flow/circulation rate in your tank. I've seen and had LPS and softie tanks with 30X turnover. So for a 55g tank you want between 550gph - 1650gph. You'll need some powerheads to make enough water movement in the tank. If I were you, I'd shoot for 1000gph flow and circulation - combined between the sump and the in-tank power heads.
If you just want to move 100-150gph through a sump - all you need is 3/4" drains. Even those would be overkill, but it doesn't hurt to over-design the plumbing for the pump you are going to use.
Assume the pump has a head pressure of 4 feet. That's typical tank height off the floor and your return pump has to fight that vertical rise as well as some elbows and assorted fittings along the way. I've never used a Quiet One pump, but a lot lof people have good things to say about them. A Quiet One 2000 would provide about 200gph at 4 feet head pressure. If it's too much, you can always build a bypass Tee into the return line down in the sump and just divert extra flow back into the skimmer compartment or refugium. That's something a lot of people are doing to gain a flow control advantage instead of just allowing a pump to run wide open.
The outlet on the pump is 1/2 inch. Pipe it all the way back to the tank in 1/2 inch pipe. Don't increase the pipe size on a small pump such as this unless you're going to pipe it like 20 feet or something crazy.
Then you just need enough power heads to get up to 1000gph total system movement.