Thanks for your replies. I had some money credited at OTR so ordered the smallest of the cases (33 liters). I will look into the lidsafe!

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Pete, XT660R '07 - @8200 kms
Snorkel removed, Acerbis handguards, OTR Rack/Pannier rack, OTR sump guard, GIVI MonoKey topbox, Abus Detecto 8000, Navigon GPS.
Stolen at 2269 kms... found again 10 days later - not a scratch, and with a cover and the lock on it... Mr. LuckyMan