I would think the cut-in and cut-out would be about the same whether it's chest or upright. If it's really short cycling, it's probably a defective thermostat. If you want to try adjusting, move both the cut-in and cut-out screws a little at a time until the short cycling stops. Check the temperature with the thermostat dead center, it should be about 0°F. Adjust the cut-out up if the temperature is too low, adjust the cut-in down if it's too high.