I would generically advise you to ditch the quick-release spring bars and reuse your Omega spring bars, which have slightly larger pins/tips than the generic 0.8 mm, as mentioned above. They are also of much higher quality and almost certainly more rigid. Additionally, Omega is specific about using longer spring bars for rubber and fabric straps. That is actually a very good idea.
If you want Omega's specified part numbers for spring bars, just mention the lug width on your Speedy.
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