So I have been practicing with a techsew GA5-1 and seem to be getting something of the same sorts....start the stitching-keeping a straight line...stitches look good then all of a sudden in the middle of the lenght the stitches go way down in the leather, so like going along fine then way too tight then fine again, go figure, also the top stitches look like there on an angle and the bottoms are straight and great. Ive been practicing with black 277 on top and white 207 on bobbin so that i could see where the stitches are being pulled, sometimes great , sometimes not so good. Thanks for the needle too big tip on the slanted thread I'll try that tomorrow. Also playing with a consew 206 rb, way to fast for me to even practice on...the thread keeps flying out of the needle and I have to keep rethreading it..just a pain till I get the servo and speed reducer I'am making on it.
Thanks all, this is the best informational site, read it all the time.