I specifically want to test
I'm having trouble with Print in Place models and I'm trying to find out if there's something I can do to improve my print quality.
The printer I am using is a Kossel clone, specifically a FLSUN QQ and assume FDM printing.
The best place to start looking is to go to Thingiverse and search on 'benchmark'. There are a great many models there intended to test various aspects of printing. In fact you could search for example 'calibration benchmark' or 'calibration test' and get more specific examples.
Actually, here is a collection I just made today of the benchmarks I thought most promising. Disclaimer: I haven't tried them yet!