I just disassembled a second-batch Q8 to measure the grooves and o-rings for you with a caliper.
The battery tube’s o-ring grooves are approx 47.9mm. The o-rings measures approx 41.0mm when relaxed. Their thickness is approx 1.4mm.
The bezel’s o-ring groove is approx 52.0mm inner diameter. The o-ring measures approx 54.0mm inner diameter when relaxed. Its thickness is approx 1.8mm. Yes, I measured the o-ring as larger than the groove it sits in.
I’m almost want make my purchase from BG until see this price. Tempted with such price, temporary no update coupon that near to GB price.
USD 35 are price that subsidized by B2C platform.
Seller mark price USD41 which same like our GB price.
I’m in previous GB list but miss the date.
Lucky enough to avoid those first batch issues.
As far as I know there are no more codes… the GB has been over a while.
The issues were fixed a long time ago.
All has been good after the first 500 I believe it was.
6 days ago Banggood had it on flash sale for $49.95. That is expired now but if you keep looking around I would be surprised if it does not pop up somewhere for under $50 again in a week or two.