When re-attaching the shifter to the linkage with the long bolt, there may be some difficulty getting the base of the shifter, with the new bushings, seated between the arms of the linkage. To make this part easier, I inserted a pair of pliers between those arms and stretched them out a bit.
I also taught Masters Students at Imperial for 3 years. The molecular formula for cyclohexane is C6H12, therefore one molecule of cyclohexane contains 6 carbon atoms and 12 hydrogen atoms. The relative atomic mass (RAM) of carbon is 12.011 g/mol. For hydrogen the RAM is 1.008 g/mol. Cyclohexane's molar mass is thus: (6 x 12.011) + (12 x 1.008) = 84.162 g/mol.
Now we can find the molar mass of each element. For carbon, we multiply its molar mass of 12.0107 grams per mol by two because we have two carbon atoms. This equals 24.0214 grams per mole. For hydrogen, we multiply the molar mass of 1.00794 by 4.