kgeo

I have a consew 206RB-5 and it is a needle feed walking foot, if I'm not bad fooled the 206RB-3 is also a compound needle feed machine. Don't know the answer to your problem but don't think you need another machine.

I use bonded nylon or polyester depending on uv exposure up to a 138 with on problem. Polyester for outside and webbing. Groz Beckett and organ titanium needles. Changed the original motor to a consew cs1000 servo with 2" pulley and the old gal will see step stitches in leather or Cadillac along on upholstery all day long.

Well I had the same problem. Motor under warrenty bought from one of the sellers here and didn't get money back or repaired, Was told it must have been something I did, they had never had that problem before. Go figure.