dear lowyat reader that read this thread, not to spam or keep making this thread longer and longer, i read since page 1 and just can't hold back but to post my opinion on this.
seller have to pay full refund cause the item is faulty with 'impact damage' since april and yes, mr silverfire, your question is invalid, the 'Y' in the invoice indicate the unit is covered by warranty
against manufacturing defect, NOT impact damage, that is why the quotation of RM1202 is there to repair the damage cause by end-user.
i have similar invoice when i bricked my phone with a 'Y' on the warraty section but was quoted an amount to replace the mobo cause bricking it is my fault, NOT MANUFACTURING DEFECT.
silverfire, you got the lense from your friend or other people is none of TS business and the
name on the invoice is not required since the serial number match and when you sell the lense to TS. this is strictly business between you and TS.
the fact that TS found the fault only after 50 days is quite eye-brow-raising at first but after i read through the whole thread, plus the evidence presented by TS, it's normal for him to mislook or missed out those 2 screws since the lense is not used 24-7, my personal exp is my gundam kit have broken parts inside due to harsh handling but i only discover it 3 months later when i have the time to assemble it, lucky it's just a gundam kit (MG btw).
so silverfire, if i were you, i will apologize and give TS full refund out-of-pocket first, get back the lense from TS, then muster up your gang to go find the person that give/sold/pass you the defective lense in first place and kerjakan him kaw kaw. this way TS happy, you happy, rapport saved.
p/s TS, good luck in your quest, will bookmark this thread and keep it as lesson learnt.
cheers!