Don't those things just glue back on? Ok ok I had to say it, sorry I'm not helping here...I had a bottom end welded once that had a pretty good sized hole in it, I remember the guy welding it made a big deal about the heat involved and that it conducts through aluminum over bigger areas, meaning its much safer to have parts removed completely from the area to avoid damage to surrounding parts/plastics and such. The guy I used did a very good job but was extra picky about the job setup.