very nice photo. it might be the stack tolerance plus slightly warpage of your old one. (tolerance may allow you to have everything on the "high" side, for example, bezel warpage +/- 0.x mm corner to corner, lcd stack thickness +/- 0.x mm, etc.etc.). As for the camera ring, it may have dual supply chain...if TCL can not fulfill using one vendor for the ring, for example, they might get a second source...tooling might be slightly different... (depend on the contract you sign, tooling you can spec/pay/ or your parts price including the tooling - that belong to the vendor...however, you risk to have "counterfeit"... name brand usually pay for the tooling and demand to be strictly controlled and destroyed after the contract fulfilled). based on the volume of K1 supply on and off, i am not surprise if it moved from small production to large volume one and may get a new tooling... just a guess. Glad you got a perfect unit.. don't be Jerry. enjoy.