hi, i have made a wooden support so i dont over-reach when shooting from the drivers seat (rhs dont forget) through passenger window. I then have my right elbow on steering wheel and my left elbow on center console (raised in height with a window bag)
i have been having an issue with trying to find "that" position from the driving seat after being a passenger for sooooo long
To that end , after a little chat with my neighbour i came up with a solution that i hope may in turn may offer an answer for you aswell?
My main problem was finding something that would be "easy" to take in and out of the vehicle
and wouldnt damage the inside or require the normal self tappers / gaffer tape
.....then, to link it someway to the cars existing fittings / interior to provide a rock-solid platform.
I used 3" x 2" wood as it was stood in the garage but i'm sure there will be a whole medium of other stuff you may have that will do the job as well or , better
The whole project hinges around using the bars of the headrest to provide a substantial fix.
The finished article after a little spray (krylon / fern pattern - yes , i wont give duracoat a run for their money i know!) and i have added some anti slip covering to the wood where the foreend sits (the type you have on your dash to stop things sliding about). I have added two pieces of wood at different heights too so i have an option for adjustment of distance shots. There is some cushioning to sit on the dash (see pic). So, in essence, its fixed via the headest and straddles across to sit on the dash. This allows you to rest your rifle/s butt on car floor and mod against seat.
it aint BUT, its works and just needs a little "tinkering" and practice but it does give you a rock steady platform....
If you have a headrest in your vehicle then this may be the answer.......
Hope this helps someone