Knluk Fingers crossed re: delivery times/availability… Italy still tends to ‘shut down’ during August - even if Nurri may still be working, their suppliers are likely not to, and that will end up causing delays.
Re: the PIDs - I don’t know. I haven’t seen any testing done on the Nurri (probably because there are too few around). I know from several reports and personal experience that the ACS is a) VERY stable and b) easily and quickly adjustable. Bear in mind that - other than the smaller boilers adopted from the Minima - the Evo has the Vostok’s internals and firmware; ACS has had 7+ years to get these well tuned.