Hyper... The backing plates that the screws screw into float on the other side of the roof plates. These backers may stay in place when the 2 screws are removed if the roof is not moved but... they can get "lost" in the roof if the roof is moved/tilted. Suggest always having one screw & washer in the backing plate to prevent them from getting lost.
As Jack mentioned, there's some adjustment provided in the roof plate to tune hook positions. In the event longer hooks do not suffice, grinding the holes in the roof plates to allow the screws more movement in the roof plate is the answer. Notice there is rise in the roof plate preventing the backing plate from a great deal of movement towards the center of the roof (which is always the direction needed to tighten the hooks to the roof.)
A backing plate in position...
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Karl ~~~
Current: '80 Silver Targa w /'85 3.2. 964 cams, SSI, Dansk 2 in 1 out muf, custom fuel feed with spin on filter
Prior: '77 Copper 924. '73 Black 914. '74 White Carrera. '79 Silver, Black, Anthracite 930s.
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