Lolli, I have been unable to fix my spare overlocker, so, a couple of weeks ago, I bought a Singer one from Lidl for £129.
When I took it home, whatever I did, the blade refused to cut, so I took it back. Lidl exchanged it immediately, and I have had no repeat of the problem with the first machine. The second machine is working beautifully.
For £129 it is very good, and these machines are still selling on Ebay for up to £229!
Jessie