Help? FZ150 / FZ200 owners

Ok.... I have already posted this open request at the end of another thread but would like help on this asap if anyone can/will?

If anyone feels kind enough to pick up their FZ150 (or even FZ200), place it on a solid surface or tripod, select spot metering (to get the centre crosshair) and try zooming in and out of the full zoom range a few times for me... and let me know if they get any judder/bump/shifts or off-centre image at full zoom... (see example vids below for what I'm talking about)

The aim? To find out if I am Extremely unlucky / Have Lost the plot / Or am Expecting too much from the build quality of my FZ150.

I am now on my 3rd FZ150 in as many weeks ... yes *Third* FZ150s with zoom / lens 'issues' ... ??  ...Maybe it's normal??

So... Here are a few example vids (I have done many more but keeping it simple for this example) from my 1st FZ150 (Made in China, serial started with a 'J'):

https://vimeo.com/59258841

From my 2nd FZ150 (Made in China, serial started with a 'K')

https://vimeo.com/59358950

And from my 3rd and current FZ150 (Made in Japan, serial starts with a 'K')

https://vimeo.com/60120777

I really would like to know if anyone else's FZ150/FZ200 acts like this?? (or if this is normal and no matter how many I send back, there will always be some juddering/drifting of the lens/image)

I love the camera for stills... but as I purchased it due to it's great video capabilities as well, I would seriously like to know what the deal is? Never noticed juddering or drifting zoom in any of the many, many example videos I watched before purchasing...

Thanks in advance!