I have also used Marathon thread and had no problem . Have you tried Metro Thread? REALLY good price. Several of us use it and have had no problem!
I too have Marathon Threads. I have quite a collection for my PR machine. I am in the UK
Look like I'm not the only Marathon fan here.. you can't go past their colour range and quality not to mention the price-- just perfect..
I absolutely love Marathon threads, lovely finish to embroidery.
I use it for FSL also...
I too love Marathon thread. I by from Marathon Canada and they ship to the US. I have tried the Metro and didn't like it but they also offer Sigma and that I like also.
I have used Marathon threads and very happy with the results. When I first got my machine I bought a huge amount a special deal $1 each from Canada.
They contacted me to say they don't ship to Aust. I thanked them and said what a pity I missed out on the deal of a life time. The office lady said she would put it through and personally take it to the post office as it couldn't be sent the way they normally send.
Now that is what I call customer service as I was obviously only going to be a one off sale for them.
I now buy from Marathon threads in Melbourne Aust.
Marathon is alI I have ever used and you can't hardly beat their prices
here is link to the Canadian web site
http://www.marathonthreads.ca/
I have never used it so am no help there. I do use Metro thread and it sews out beautifully and is priced very reasonably. It is 40 wt. polyester. Pricing is $.89 for 1000 m and $2.75 for the 5000 m spool. They also
sell by packages. I have added the link for you.