[Bazzer]

The 3D makers here will have seen this, people who post 'stl?!?' as a reply to a 3D printed part, really gets on my ***

Is that a question or a remark, do you want to know if the stl file is available or just asking is that what you used?  It comes across as 'give me the file!'

What happened to good manners, how about 'is that stl available to buy' or 'that's great, where did you get the stl?'

stl?!? ..no, try asking rather than demanding 

...and relax 

Could it be that they are questioning what an STL files is? Or possibly questioning the use of STL files? They are pretty grotty for anything other than 3D printing.

B.