Just rake the bush!An old modified spring rake head may also work.
Stainless TIG filler rod comes in 2.4mm diameter. Would that be an option?Cheers! Just the job. I'm not sure when I'll get around to is as it's been pointed out I've been spending like a sailor on shore leave and I need to get the surplus to me stuff sold! Oops!. I need to source some 2/ 2.5mm stainless or at least springy wire. Not so long ago any decent model shop would have it for model plane undercarriages I guess it will be internet job then.
ATB and thanks
Tom