Good luck!
If yours came the way mine did, when you remove the wrapper you'll find that it sits in a custom metal crate. Well, more like a kind of rack.
To get the mower out of that, attach it to the tractor, lift it up, and then you can wriggle the rack out from under it.
Mine even came with bushings for the iMatch, works great and fits well. Didn't even have to cut the PTO shaft (with flail mowers, the shaft is rather long and so has a lot of adjustment length)
But you'll be happy with it, I mowed some overgrown ugly corner on our property with small trees (0.5" diameter or so) and it didn't even flinch.
I have the hammer blades.
But, it needs to be said, it's not a finish mower that has wheels in the front and the back which would provide a consistent mowing height. Which means that the mowing height, which can be adjusted by tilting the mower via the top link (in addition to the rear roller height), varies depending on terrain. Especially when going uphill and the terrain levels out, or when going from level terrain to downhill, the geometry of the rear rollers and the tractor's rear axle changes, and mowing height decreases. Same when going from level to uphill, it'll increase. I've scalped some areas of my lawn (zero-turn was in the shop, so I used the flail) on accident.
So for pastures and overgrown fields, great, to mow a lawn at 2-3", not so much. Plus, it doesn't mulch very well, so it left quite some windrows.