Hi Scott, the dual hook external compressors have a narrow curvature that would not hook onto the 107 spring diameter (and there is no room to fix them). The internal "W" compressor cannot be inserted inside the 107 springs with the subframe on the car and the brackets holding the hooks they come together before the spring compresses sufficiently to install/uninstall. They are utterly unsuitable for the 107. There are in this forum the correct Klann clone compressor for hire for the cost of the dual hooks ones.
Even then, in the 107 you will have to drop the subframe from one side to allow the compressor spindle to be inserted from the top spring cap. (see pic)
The alternative some guys undertake by dropping the lower control arm until the spring extends is suicidal (the road to the cemetery is paved with good intentions!).
Faced with having to drop the subframe one side at the time, why not consider removing the subframe altogether and replace engine mounts and subframe mounts in addition to bushings? And while it is out of the car you can give it a good coat of paint and 5 bibs spring caps as your springs will be a bit tired if they are the original ones. Just a suggestion which I carried out a few months ago and made all the difference. Hope this helps.
