OK, you've twisted my arm & I have had a clamber around under the roof of my garage to search for those tools I knew I have & have used on several occasions.
So now you have pictures & yes I know that I'm the person that says a picture saves a thousand words but here you will need to use your imagination a bit.
There is a photo showing the bits of the tool in more or less the positions they would be used.
Comprises a lower bracket through which a bolt passes & locates the lower end of the damper keeping the threaded portion for the anti-roll bar attachment away from the floor & free from damage.
The next parts are the 2 steel strip hooks which wrap around the top of the spring coil(s) & into which the wooden cantilever will rest.
Not shown, the all important Wooden plank cantilever arms which must be positioned to make leverage easy for yourself BY SITTING ON THEM!; this leaves both hands free to centralise things & fitting the spring top retainer ring at the right time. From memory a couple of levers about 140cm long will do the job OK
The other part is the pivot point (fulcrum) for the two wooden plank levers.
The levers are simply drilled through & retained on the pivot point.
Other than the photo there is a sketch of the spring hooks that can be simply replaced by strong thin twine.
The other sketch shows these parts together with a spring/damper & the lever arms all positioned on the floor & the lever pivot screwed to a wall.
Note: This pivot point can also be replaced by a heavily loaded shelf if you have one at a usable height.
All forms of wooden packing to get things to work is of course you free choice.
Believe me, assembly is quick, simple & not at all scary (well yes a bit scary with those Spyder springs
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