[theawesome1730]

The blocking mechanism cannot exceed a 6 inch diameter per R3

R3
The ROBOT must satisfy the following size constraints:

the total length of the FRAME PERIMETER sides may not exceed 112 in. (see Figure 4-1 for examples),
a ROBOT may not extend more than 20 in. beyond the FRAME PERIMETER (see Figure 4-2 for examples) (see G24), and
the ROBOT height may not exceed 60 in., except as allowed by G23.
Any extension above 60 in. may not exceed a 6 in. diameter vertical cylinder (see Figure 4-3 and Figure 4-4 for examples), per G23.