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Cut out a small piece of double-sided tape. The tape should be of the “foam” type, around 1mm thick. The latest releases of the LPVR Varjo kits contain a piece of tape for this purpose.
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Attach the double sided tape to the upper part of the Varjo HMD marker holder.
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Peel off the cover of the double sided tape.
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Attach the upper part of the Varjo HMD holder to the Varjo HMD.
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Attach the lower part of the HMD marker holder to the Varjo HMD.
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Fix the metal screws (left and right side) holding upper and lower part together with a screwdriver.
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With this the Varjo HMD marker holder is assembled. You can now attach marker poles and marker balls to the holder.