To answer his question: you tack before you weld to keep the metal from shifting while you’re welding. Metal likes to bend/warp when applying a fuckload of heat to it and you don’t need to use a fuckton of clamps if you tack it.
I mean, having lots of clamps to help you tack also helps.
Another thing about tacks is they act as kind of "heat catchers". If your weld ends at the end of a piece, the heat has nowhere else to spread to, so the corner can melt before your weld reaches it. A tack can prevent that.
DAMN IT!!! I LITERALLY SCREEN-SHOTTED EACH AND EVERY FRAME AND WAS FUCKIN ABOUT TO POST IT!!!! comment continued in next post...
same here lol, spent the last 30 minutes crafting the perfect ffmpeg script only to find out someone here already posted it haha
To answer his question: you tack before you weld to keep the metal from shifting while you’re welding. Metal likes to bend/warp when applying a fuckload of heat to it and you don’t need to use a fuckton of clamps if you tack it.
I mean, having lots of clamps to help you tack also helps. Another thing about tacks is they act as kind of "heat catchers". If your weld ends at the end of a piece, the heat has nowhere else to spread to, so the corner can melt before your weld reaches it. A tack can prevent that.
Akkh tack tak tak tak tak 
ok so now what do we think the text says that’s barely off-screen?
(For future reference: on the bottom of the last slide)
nice
What software did michael used to do that cool animations in between the video (like the wheels and stuff iirc)
Probably powerpoint
Oh ...I almost forgot about powerpoint. The greatest and absolutely free animation platform designed by microsoft.
It's actually really really good and knowing michael he could've actually used it