I said I would update you all...
Well I have finally found the time to play with the new overlocker. It is a bit daunting with the 4 threads. Did try to pull the threads through when I changed colour. But I didn't tie it properly and it just came undone.
So I rethreaded from scratch and broke a needle. Not sure why but I replaced it and it is now running fine.
I had to reduce the tension on the needle threads for the stretchy material I have been using as the stitches didn't seem to stretch. Is this normal? Have fiddled with the tensions and they seem to be better now.
Christmas was a driver for me. I thought I would make some T-Shirts for my niece (13) and nephew (17). So these were the results - mostly done on the overlocker except for the bottom hem (twin needle on sewing machine) and the top-stitching around the hoods.
The stretching while sewing was a bit tricky and not perfect and I had a bit of a hiccup attaching one of the hoods but it doesn't show too much. So they are not perfect but I think not too bad for a first try - I'm pretty pleased with the machine. The finish is so much neater than using the overlocker type stitches on the std machine and a lot quicker.
Overall I'm very pleased with it - it even has a built in thread cutter which I think is great.