Thank you gr5 for your very prompt reply.
I gather from your answer that my stl file will be accepted by cura but that any thin section/antenna will be missing from the display. (Sorry to check the blindingly obvious to you but getting long in the tooth means being over cautious I think).
I've avoided the mid air hanging problem by having support set to everywhere and as you pointed out it works well - as demonstrated by my second print which had a domed cylinder cut out of the bottom of my shape (ready for an LED).
Again, thanks for the help.
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gr5 2,224
The most common (and obvious) issues are that it often won't print certain parts of your model - thin sections such as a thin wall or an antenna or something < 1mm thick.
The other common issue is that it fills in holes that are meant to be open.
More difficult issues to spot is when it prints "in mid air". Imagine you are printing a model of a standing person whose arms and hands and fingers are all pointing down to the ground but also held away from the body. Those finger tips will be printed in mid-air and just fall down to the bed.
Bridging works great on 3d printers - for example if you have a wall with a square opening it will print the top of the opening just fine. But if it is an arched opening - it will work - but the quality won't be so great.
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