Just received two of these. Outward appearance, build quality and materials are good. Inside is not so good, though fixable. Two main warnings before you buy:
1) The atomizer contact pin is a slotted copper screw. However,
it is not adjustable. The far end of the screw inside the base is soldered to the positive contact wire. It will turn a bit, but if you turn it too much the solder point will snap. Many have done this and learned the hard way that the atomizer contact screw is false advertising.
2) The mod contact pin is indeed adjustable. However, support behind the fitting it screws into inside the base is weak. The bad one I received had no support at all, so if I try to unscrew to raise the contact it doesn't move. This I will have to fix by opening op the bottom cover of the base, which is interference fit and not easy to remove.
That said, I'm keeping these and getting another. It's a clone, so as usual I expect to finish it myself. While I am at it I'm going to upgrade the atomizer contact with a $2 spring loaded core from Fatdaddyvapes. Those little buggers really come in handy.
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Orchid V4, Ignition clone base, Caravela 18350. Assembled height w/o drip tip is 74mm.