Thanks all for the information an thoughts provided. The conversation with this guy kept going on as expected. In the end I got fed up and paid him the 50% refund and promised myself I would never ever ship things I sell to countries other than e.g. UK, France, Belgium, Germany and my own country ...
For everybody's information, this is the additional information/questions he provided;
when asking him to take the sender unit from the cylinder head:
I will try but most article say that this is dangerous and could damage the bulb as the bulb gets stuck in the head sometimes. I can do it but if it gets damaged then will you refund complete? Mine is using an Adapter so this most likely wont happen but just to note that it might. A better idea would be to dismount the meter and shake it to show the free play? Not sure what can be seen from the Bulb condition? looking for Kinks or discolourization from contact? You suspect there is no full contact?
Then I explained what I was looking for:
Oh I add adapter already so definately not bottom out. I can send picture. Do u agree if I remove meter and shake ia sufficient to explain the free play?
Explained it still could be the case the sensor/bulb would hit the inside of the head.
Yes I did, thats why I dded the adapter
My head is 12G940 , I have a spare
Without adapater it fits bit touches just a little, with adapter we move it 1/2cm back. I have a a vernier gauge to measure
Its 100% not touching. I can remove it if it makes you happier to show you.
So if you see that its not kinked , will you refund 50%?
This is adapter
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This is fitting on my spare 12G940 head. Its fits snug, almost touching the wall but not literally touching. With adapter its definately not touching anymore. Too far away
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No matter what difference in casting
of same Cast 12G940