pdqquilts

I have a Mega quilter 18x8..w/ stitch reg. and q both on inspira frame. Problems with bobbin tension & winding a bobbin. When I drop the bobbin to check tension it won't hardly move..have adjusted tension screw to point it has fallen out...seems like a pre wound works a little better. When I can get it to stitch it is only a short inch then a big loop shows up. I spent a huge amount of money to have nothing short of junk! If anyone has ideas please let me know....thanks a head of time! Also local Husk. Dealer no longer carries needles...help on where to order from.