Has anyone tied a full length sub-frame connector to the floor pan along it's entire length? If so, what was the result. Looking at it, a sheet metal sheer web between the sub-frame connector and the floor pan should give 90% of the stiffening effect of a through-floor installation without the intrusion into the footwells. I know it'd cost a fortune in fabricating if you paid a shop to do it, but if you have your own shop and time to do the work, it seems like it could work well to really stabilise the whole floor pan. I'm thinking of a competitive autocross car that remains a daily driver. Thoughts?