I think that with the Easyfit XL attachment I linked to, you can use either style of clamp as it creates a second layer of rack
Sorry, only just noticed your follow-up replies, but really helpful - hadn't seen this Easyfit thing before and might be just the job for camping stuff + a toddler. Cheers, that's great.
@NurseHolliday started
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I think that with the Easyfit XL attachment I linked to, you can use either style of clamp as it creates a second layer of rack