Spent yesterday sorting out my Beolit 600.
It was in a very good shape cosmetically, with no damage at all and battery cover included. Sadly, there was no tuning string in it when I bought it. So having ordered the string from Martin I set to work!
If anyone is looking to do this then I'm sure it has been discussed before, but it is a real pain and takes patience. Martin's advice of masking taping each stage was really useful. Also remembering the process and the exact amount of turns is useful. This is contained in the service manual available on site. There isn't really an easy solution but be patient and you will get there!
The curry 400 is absolutely fine luckily, but I have got spare string if required.
Finally, has anyone found any cardboard tubing that is a good substitute for a battery cover? I need one for the 400!
Thanks!