PS I think the chain adjustment c-spanner is different on the Evo from the later models like the 821/1200 so make sure you get the right one.
The Evo uses the same one as the 748/916 and S2R. There's a Laser one (no. 5035), which does the job. £14 or so from Machine Mart.
https://www.machinemart.co.uk/p/040815035/