Mounting the Body on an X-5

[cutting edge]

Hi all just got to the stage of cutting and mounting the body on my X-5 has anyone done a rear Body Post yet i am thinking about mounting a post in the rear centre screwed up from inside the belt tunnel Any Idears

The vercro does not look like the best option here just the easy option

Or am i worrying to much I have just seen a lot of Pred Bodys comming off latley and i belive those were held on with velcro