The conformation energies are computed with respect to the lowest energy conformer for each series of conformers. All three approximate methods correctly identify the lowest energy conformer (albiet in ORCA, boat-a and 4444-a have nearly identical energies). Compared to the DLPNO-CCSD(T) algorithm in ORCA, the DLPNO-CCSD(T) algorithm we implemented gives closer answers to the canonical CCSD(T) value for the conformation energies in all cases. Surprisingly, even though the 3b:mb method gives more accurate absolute energies than our DLPNO-CCSD(T) method, the accuracy of the conformation energies is comparable. This shows that with a tight enough tolerance, local correlation methods can capture subtle higher-order, many-body electron correlation effects. Absolute energies are included in the supplementary material.