when i first purchased my Viking the dealer told me to NEVER try to use Coats & Clark thread in it- NEVER-EVER!!!
told horror stories- said it would mess up the machine, said it simply would not accept it-
for the first year i did not use any c&c thread- then one day came along- i needed to use a c&c thread- it was what i had in the color/weight i needed- and i threaded it- quaking with fear of doing damage to this horribly expensive machine...
it sewed just fine- nothing happened- no alarms went off- the thread did not break, knot, cause any problems...
took me awhile but i finally figured out- they just wanted to sell the expensive thread they were selling- (some of which i find to be garbage!)
so, anyhow-
i no longer think of my machine as (finicky)
that being said- the long arm is a bit more finicky---some threads just do not handle the high-speed action of that machine...so that's a whole different issue.
