I have a Pro600 and have been having a problem with the spiral hook that I wonder if anyone else has run into.
I have the 'burnished' one - so part of my question is whether or not anyone can comment on the coated one.. but first to describe my issue:
Using a Lehman dough recipe for NY-style dough at various hydrations (most recently 61%), I have a problem with the dough constantly sticking to the hook; Ultimately the dough winds up just spinning around in circles rather than being worked, and I have to stop, push the dough down off the hook, and restart. In less than 30 seconds (it typically happens pretty quickly, like 5 or 10!) it will stick again.
I've been working with ~395g of flour; about 640g of total ingredients, enough for 2 dough balls. I tried increasing to 3 hoping the extra mass would keep things down and moving, but it didn't help one bit.
Tonight I made another batch and started playing with the mixer as it worked. I found that if I set the bowl lift at about half way between unlocked and locked (the handle sticking out perpendicular to the vertical axis of the mixer rather than fully up (bowl raised/locked) that the dough didn't stick and instead was really being worked by the hook down/into the sides of the bowl. I didn't hold it rigidly in place either; just firmly enough to keep it in the same general place but letting bowl move up and down a bit from the pressure of the hook working into the dough and pushing against the bowl.
I have oiled/sprayed the hook beforehand or even during the process to no avail; The dough just seems to incorporate the oil right off the hook and it goes back to twisting it's self around the end of the hook and spinning the entire mass around in circles.
So.. as I said at the beginning, does anyone have any experience with the coated hook compared to the burnished one and whether or not it sticks less? The burnished hook's surface I wouldn't describe as "rough", but it's not glassy smooth by any means and seems like it's just that much more surface area the dough can grab onto.
I can certainly babysit the mixer and hold the bowl half-raised, but it's obviously boring and a bit irritating. My only other possible solution is to buy an extra hook and try cutting about 3/4" off the end so that it's shorter, effectively accomplishing the same thing but letting me lock the bowl up and go on about washing the dishes while the mixer works.

But does anyone know if the hook is cast hollow?
Thanks in advance for any additional insights on this.