i think u wont be able to sell the car...cos jpj will check whetjer the roof there got welding b4 or not..then u wont pass the inspection..that;s wat i heard from my fren in jpj..and the engine code thingy, jpj actually are trying to check it very detail..which mean the chances u can get a way is very less,,,
the star got list out the part that jpj gonna inspect and the rule for it..i think u need to get approve first...make ur roof fust..then go to get approve..then install the sunroof