However - with lots of fuel and only two in the front you're W&B is seriously out, so needs careful consideration.
What do they do to register it for 1999KG? Do they actually do anything, or is it a paperwork exercise? If a paperwork exercise then surely the W&B will remain the W&B designed for the aircraft by Piper (i.e. it'll behave the same as a Seneca II in the USA).....just you might be overweight on paper?.....if you see what I mean