Window grilles for Defender 110, 2005

On my LR Defender 2005 I've already fitted rear window grilles and am about to have grilles made for the rear side windows and passenger door windows, to be fitted permanently (also on the driver and front passenger doors and windscreen, to be removable). The purpose of all this is anti-theft security on a journey we are going to make.

I am considering the pros and cons of fitting the rear-window and passenger door-window grilles INSIDE / OUTSIDE.

Inside: (1) harder to force off (should anyone go to that extreme): to get them off, windows would have to be broken
(2) allowance needs to be made for retaining access to catches for sliding windows

Outside: It will be difficult or impossible to clean the windows properly; but on the other hand, windows not likely to be broken by stones/rocks etc.

Any opinions, please? I would like to hear from anyone who's fitted grilles, and anyone else, and if you have time or inclination it would be good to see photographs of how removable grilles (front doors and windscreen) have been mounted. Thanks.

2" square mesh from your local metal supplier secured using brake pipe P clips screwed around the window frames on the inside of the windows. Add a dog guard to seperate the front from the rear area. Easily removeable when you want clean the windows and the you don't have to do it so often as the outside.

hi, all.i want to make my own for a defender 90.does anybody know where i can
find a CAD file(dxf or dwg)?i can measure and draw them up myself, but why if somebody has done it already.i think 2.5mm mild steel laser cut will be strong enough.i want to fit it to the inside as this will also stop loose parts inside the landy breaking the windows then something goes wrong.