Throw away the fabric pots and get airpots. Even small one's. Here's what happens when you try to root bind a plant in a 50 litre air pot. Try one, all my mates did when I told them. They all use air pots now.
How many cuts, or how far apart? Is it just quarters? I do not understand why people do not just use airpots. Here's a 50 litre. I should have repotted it long before this, but I didn't. Do you think I need to cut the roots?
Airpots, there is nothing better, here is a 50 litre airpot. Try getting that root development out of anything but an airpot. Try one and you will burn your plastic bucket