Thanks very much for the share Vin :)

Apparently there is some V1 board who have the contact silicone pad and/or waterproof coating.
But the most important is that one sold here is a V2 :)

Also my tube mod is not old and have V2 in,i buyed a spare chip as i do really like the Chtulu mod.
In 18350 configuration,"assorted" with Chtulu 1928 dripper and 0,5 to 0,7 clapton,that a very tasty,punchy and small MTL set up for raisonnable price considering the more than good quality of machining tolerances/assembly/fit&finish.