Lavender flow in full swing here in Provence — notes on timing monofloral supers

Quick report from the Valensole plateau: the lavandin has been open about ten days and my 30 hives that I moved up here at the end of June are absolutely hammering it. Supers that went on empty on June 28th are two-thirds capped already. For anyone chasing a monofloral lavender crop, the timing detail that matters most: your supers must go on EMPTY (or with only drawn comb) right as the flow opens, otherwise you get a blend with whatever spring honey was left and you can't sell it as lavande. I extract everything before moving the hives, then move at night, entrances closed, about 40 km from my home apiary. Other note — it's hot (34C afternoons) so I've got every hive on screened bottoms with a water source 50 m away. The flow usually holds until early August here, then it shuts off like a tap. Anyone else on lavender this year?