thinking of using these screw-anchored tethers for Aliexpress boot nets (I find the factory-supplied ones inadequate). anything to watch out for ? ill-advised ?

Each to their own, but I wouldn't be randomly screwing self-tapping screws into the boot plastics in my Kodiaq.

 

The screws aren't very long, but there is too much going on immediately behind the plastics, certainly enough to warn that you should proceed with caution. Rear wash feeds, wiring etc.

 

I think I'd be looking to remove the plastic panels first to get a glimpse behind them before screwing them in.

Me too for the ones at the rear most (that are covered by that board thing).  Whenever I raise the board thing the nets go 'sproing' and come un-done.

 

I have some pics from the last Kodiaq I had (that sunk) with all the coverings removed.  If you can hang on a day or so  I'll upload them so you can see what is behind the plastics.  

Sorry for the delay, see below.

 

No comments on the state of the grassed nature strip please.

And now the inside of the boot panels.

Last one.