9ft long hone extension shaft

[Frank S]

I like the disc supports. I'm pretty sure without them you would end up with an out of round bore at least part way through. I will remember this Frank.

yes correct, it is next to impossible to control a flexible shaft stone glaze breaker any distance from the motor source without guides.
Nylon or UHMW plastic or plywood makes the best medium for disks in this application
However all I needed to do to the bores on the 2 hydraulic cylinders was to remove any stuck deposited bits of the crumbled seals and any light rust scale that may have formed inside the bores from possible contaminated oil. The cylinders were mostly empty of oil but even still having the hoses connected moisture from the air could have entered and this crane has been laying out exposed to the elements for the past 6 years