Yamaha RD350 - Engine cover fixed

Off late the mechanic of my RD350, found a way out for the broken bottom cover of the engine. That is to take the case to the aluminium fabricator to fix the broken part. You know what the fabricator has tinkered it well so the broken area got the original shape.Though the area where a small piece of the metal broke off is a screw mount, after the tinker's work it looks great and fits properly. You can see a bright white area in the above picture where the actual fix was applied, if the above picture is not clear, have a look at the area from bottom view(bright area next to the orange colored stuff). Since the broken engine side cover is bit of thin fabrication, the tinker couldn’t fix it as he could do for the bottom cover. Hence search is on swing.