Will you be treating "overloading" only as MAUW exceedance, or do you count loading below that but outside CoG?
I regularly fly EC120 close to MAUW and it can be intereting in gusty conditions. Down-wind taxi (in particular) can lead to running out of lever and (at worst) having to settle for a moment. Left-spot-turns can also be challenging at close to MAUW - which is why I tend to make them to the right when close to max power.
This EC120
http://www.aaib.gov.uk/cms_resources...0B,_EI-IZO.pdf is below MAUW but loaded 5mm fwd of CoG limit. Uncommanded nose-down attitude possibly caused by wind gust did not prove to be controllable.