They've responded, but asked do I need the special which assemble the powermeter, I assume I didn't need it right?
Do you mean the tool to attach the spider to your cranks? If you already have one, then no you don't. But you will need it to assemble the PM. And Loctite.
Do you think some bike shops will have it?
@TTM started
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They've responded, but asked do I need the special which assemble the powermeter, I assume I didn't need it right?