I've got the original bracket on my Sie. I'll see if I can get a few measurements.
To be honest I think the bracket is a bit over engineered and jubilee clips are crude, even though I have changed the clips to stainless.
I like the idea of P clips, but instead of the bracket altogether. I don't see why they wouldn't be strong enough on their own, bolted into the bracket's holes.
It would save the weight of the (steel) bracket and look neater.
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