when it comes to bottom feeding there are 2 different schools of thought, one is to have the bottom feeder feed a juice well just like a dripper would normally have, and the atty will then wind up working just as it did in drip mode, squonk, hit it ~10 times or till the juice well is depleted and then repeat. the drawback to this is the same drawback that the atty would have if it was being used in drip mode and that drawback is that the excess juice can leak if the well is full and the mod is placed sideways and the other drawback is the excess juice winds up getting cooked and tainted eventually
the other school of thought is a bottom feeder does not need any well holding juice at all, a squonk should saturate the wick and coil and then retract, leaving a dry deck with fully saturated coil and wick. in my opinion that is the best way because the best vape possible does not want a pool of juice, it just wants a wet coil and wick, vape suffers when the coil is sitting in a puddle and there is no advantage to vape quality with more juice and wick while there could be disadvantages, such as burnt excess juice and pooling juice at the coil.
I love the odin. the odin does not have a very deep well, especially when you consider that the well is only as high as the bottom of the air inlets, so the well is no problem on the odin but I think it still works better if the feed is right at the deck so it can fully evacuate after each squonk. I'm sure most drippers have seen how the vape quality can actually go down if you drip too much juice in the well, it vapes well when there is enough juice but not too much, this method of having the squonk hole at the very base ensures there is never too much juice and never any chance of leaks because there is no pool.
here is a shot of my first build on the odin. you can see that right after a squonk, this is what's left before you even vape it. there is way too much wick as a bottom feeder in this particular build but it's the only picture I have right now
now just to show what I think an ideal squonk would be, here is an atty base that I built specifically for bottom feeding. this was an origen V2 that originally had a very deep well and it suffered because of that as a bottom feeder. I made a new deck that filled the whole well and it now went from being one of the worse 22mm bf atties to one of the best, just by eliminating that huge juice holding well... the odin is just as good as this right out of the box with a low feeding hole
the feed:
and after releasing the feed:
here is another misc atty set up for an ideal bottom feed:
a drippers mentality is the more juice it holds the better, but with bottom feeding that's not the case, here the less juice it holds the better, this way you're getting fresh juice each vape, ideally saturated yet with no pooling or excess juice anywhere. it is an inconvenience to drip so the more time between drips is good for a dripper, but bottom feeding is different, it's no bother to just put a little pressure on the bottle to re saturate every hit or every other hit. also a dripper will tend to use much more wick to hold more juice but as a bottom feeder the opposite is true, too much wick can actually keep juice away from the coil so an ideal bottom feeder setup will have just enough wick without any excess, that's what makes a bottom feeder superior to even dripping is just enough wick and just enough juice for an ideal vape. here is a typical bf wick setup. as a bottom feeder you do not want or need much more wick than this....
if you approach this with a dripper mentality which is that it's just getting refilled from squonking rather than dripping then yeah a higher hole makes the most sense, but if you really get to know bottom feeding and see how the vape actually improves with minimal wick and minimal excess juice then you'll see why the lower hole and full evacuation is actually better. if you look at what's regarded as the best vaping bottom feeding atties out there you'll see that they are all fully evacuating.
again I love the odin as is with a low feed hole, if I had to have any critique to the odin it is that the offset air slots would be better off centered so the coil doesn't have to be angled to center it with the airhole. I see why the slots are off center, because that's the only way to use it as either a single or a double, but lets face it, this atty chamber is too large to give an ideal vape with a single coil so realistically it's a dual coil atty, doing away with the single airhole slot and centering the existing 2 slots and this atty would be king, that's the only thing I can critique on the odin but even as is I think it's the best bang for the buck atty I've seen in a really long time