<$link to={{$:/_opTaskStore!!taskname}}>{{$:/_opTaskStore!!taskname}}</$link>
Sorry I can't get a direct link from the phone, don't think this works;
https://groups.google.com/forum/m/#!searchin/TiddlyWiki/Variable$20eric/tiddlywiki/3DyHxqqFQbg
Eric is a TW Jedi. The cribsheet is in there somewhere, posted by passingby I believe, but all the contributors know much more about it than I ever will. Good luck!
I'm really struggling to get my head around TiddlyWiki syntax...
Thanks both. Will do.