hemmjo; That is not just your swag, you nailed it. A construction company I do quite a bit of work for has several of the much smaller versions of that machine, theirs also incorporate compressed air to assist in pushing the optic cable through a buried pipe from 1 end while pulling from the opposite end. So far I have rebuilt 2 of their machines, which are a real pain to rebuild, due to the lack of spare parts available from the manufacture who no-longer supports the machines they made after being bought up by a larger corp.