Winter transmission builds

This is apparently the converter charge circuit and in an earlier portion of the same video they thru-drill it into the center region of the stator to 1/4" ...i'm wondering if my stator tube is slightly indexed off and it's limiting the passage because I ran a welding rod thru to help gage the size.

Since yours may be slightly off, wouldn’t be a bad idea to open that hole up from .040, as that’s pretty small. Probably don’t have to go .250 into the stator tube, but maybe .125, just to make sure it’s less restricted? Is it an aftermarket stator tube, or stock stator tube? I would have to check the size of one that hasn’t been modified and see what the size is. I don’t know off the top of my head.