Originally Posted by jordo_99
The "expert" recommended a different needle that's supposed to handle silnylon better and reduce puckering further but I've only snapped them because my Necchi wasn't quite adjusted properly and it has taken back in for servicing...I haven't gotten it back yet to try them out again.
This is a new one on me. I would like to know more about the needle. Needles should not break unless the machine is so wildly out of adjustment that it won't work right anyway. This assumes you don't torque the needle by pulling on the fabric. I suspect the new needles were not compatible with the machine. There are a few proprietary needle configurations out there and industrial machines often require different needles than domestic machines.
Why do you put the word expert in quotes? That usually implies the term is not applicable to the situation. If the person is not really an expert then maybe you should seek out folks who are. Like your local sewing machine repair shop.