Ways to increase smart motor torque?

We are trying to increase the capacity of the Reverse Stacker. At present we have encountered the problem of insufficient motor torque. The motor has adjusted the torque ratio to 36: 1.
ps: Is there any good reverse stacker structure I can refer to?

Are you using High Strength Motors(red)?

Use the red colored motor cartridges for the greatest immediate torque. Then use a gear ratio for more torque, 1:7 is a good place to start.