Hi I have the sidewinder, but no longer able to use it for my Pfaff creative vision as it will not take the larger bobbins. There is a newer one out but the cost is $99.00 at Joanns. They do not let you use the coupon for it, so I did not buy. It will do the larger bobbins.
The one I do have, worked just fine for my machine that took regular size bobbins.