I’ve got a ’11 Pitch Pro (the green one) and run eskars tubeless on it.
Dunno if its exactly the same rim but here’s what I did.
Take an old innertube with a threaded valve and cut out the valve leaving ~2mm of rubber arrund the base.
Run electrical insulation tape arround the rim, making sure it goes up the inside of the edge of the rim on both sides at least a few times on each side, then run it down the middle of the rim (no need to be super accurate). I needed to add about 30g of tape to each rim which was probbaly 5-6 layers.
Poke the valve through and do it up reasnobly tightly with the nut.
Add tyre.
Pump it up with a track pump.
If it doesnt go up, remove tyre add more tape.
Repeat the last 3 steps untill they tyre inflates.
Remove tyre, add ~80ml of sealent.
Shate the wheel and slosh it arround a bit.
Inflate to whatever the max pressure is (~60psi), shake it a bit more, then deflate to whatever your normal pressure is (~30psi).
Go for a short ride to make sure its definately sealed.