hello all, i wondered if anyone has any suggestions as to how to remove the bolts holding the gearbox in place? they are multipoint socket type heads which have rounded off. i have tried the usual mole grips and lockable pliers to grip with no joy. i have also tried hex keys knocked in to turn still with no joy. i am unable to go any further with this until i can drop the old gearbox out. any help would be greatly appreciated. its a mk3 2.0 8 valve kind regards the newbie