Thanks for the link and replies. I was thinking to use the smallest size but my problem is I have never seen or handled Spider Wire before so I don't really know what to expect of it. Would the larger sizes be applicable to larger models or is there a downside ?

I can't access 008 wire where I am George or I would have tried it , Cl died in my part of town a long time ago, finding a LHS with a bellcrank let alone CL wire is a real task. I make/ad lib most of my stuff nowadays. The one hobby shop worth going to changed hands some years back and no longer stocks engines at all, they have gone all electric . No silkspan, bellcranks, lines or dope. I guess I could buy it via the web but Spider wire sounds like an easier bet.