NEW FZ150 - zoom judder?

I should probably emphasise to be clear that the first 2 example videos were from the 1st FZ150 that has been returned - that judder was certainly not normal!

But! the 3rd vid linked to was my replacement FZ150 ... not as much judder with this one but the drifting/swaying image while zooming is even worse in a way as it's VERY tricky to keep centred on something... plus makes it look hand held even on a tripod/hard surface!

will try to get some better example vids up soon.... really I am already conviced I don't like what's going on with this zoom but need to know if it's at a level to be expected (maybe find some way to cope with it?) as don't want to just keep sending back camera after camera!

The photos are stunning though - chuffed to bits with that side of this camera!!