IMO the istick feels a bit plasticy (though it isn't), but that might be due to the Cuboid being so much heavier.question 1-5 is yes and 6&7 is no, the isticks build quality is super nice, the 510 is nicer than the joyetech&wismec models, i havnt scuffed my white one yet (its a pocket dweller), and the batteries do last longer as they are in parallel. Cuboid VTC and RX200 all have the same 510 pin, its square ish and the one in the istick seems about 1mm deeper and is round ish
Sent from my M7_PLUS using Tapatalk