Then, the legs - 4 sprues with 6 legs each. Only 20 are needed, the extra number is to help with posing – which is nice.
One other sprue holds 2 mandibles (extreme left), and 20 "tertiary velocitators" – small legs going in between the main ones.
Last, the manipulators. This is the part I had most trouble with, I found them quite fragile. The good news is that as they are very light, any breaks can easily be glued back.
The documentation provided by ForgeWorld is quite good, just thought I'd expand a bit on the assembly of the forcipules. The below picture indicates how all the bits fit together.