Evening Martin,
Sorry I've not been able to join in today, this is the first chance I've had to look
I guess only you know how obscure it is and whether it'll need your input/clues to crack it (in which case, if your not about over the weekend it'd be best to remove it and keep it in reserve for later). Otherwise, if you think it can be easily found and confirmed unambiguously, then you could just leave it under "usual rules apply" .
Cheers and have a good weekend