No need for leavers with right technique. I use my foot on the tyre and can put on or take off a tubeless tyre without leavers. Changed two Maxxis HR2 yesterday no issues on SRAM Roam carbon rim.
Technique:
1. let all the air out
2. Angle wheel about 45 degrees
3. Step on tyre – sort of heal and ball of foot
4. Press down on tyre with foot pushing the wheel away
5. You might need to rotate the wheel a bit but even on old sealed tyres the seal will break
Putting them on much the same. Its also a great technique for on the trail. You end up with the tyre on one side and that little 150mm of tyre really tight on the second side where people use leavers. Don’t. Use your foot like above.
I do use two tyre leavers about 100mm apart once the seal is broken on both sides to get the tyre over the lip but there is really no force needed at that stage. Just helps.
I never lock the leaver to the spoke