I've not managed the one on the Mound yet if it's still there (I plan to make a diversion sign, attach it to a pole, and attach that to the railings, if I have time for all of that).
But this morning there was a new sign in the westbound bike lane on Melville Drive (slightly east of centre). I'd ridden by then thought, 'sod it', turned round and shifted the sign onto the grass to the left of the narrow pavement there. Still perfectly visible, and not blocking anyone's use of anything - might have me doing it on the cam on the bike. I'm going to start doing this more (the police even went past as I was walking towards the sign, but in for a penny....)