I have the same issue. Ill start harvesting in the next couple of days or so. I use the squish test combined with breaking one open to make sure there is lots of luplin.
Squish a cone between your fingers - if it expands back very quickly and is papery in feel then its probably ready to go. Next break one open and check the luplin.
These nuggets are just about ready..about 3 to 5 more days I suspect.
These guys are just about ready - they need a bit more time as inside they look good - however the aroma is still a bit weak. So Ill give them a bit more time.
The camera sucks up cloose...but I think you can get an idea from it though.