Radslide can also be included using php in a template – perhaps a widget that allows php execution would solve your problem?
Like this one ? http://ww.wp.xz.cn/extend/plugins/php-code-widget/
add then use the radslide function?
<?php radslide(2); ?>
Hope this helps!
bpmildh – looks to be a bug in the editor we are using for that field (Best Bin), we were planning to remove it in the next release. This is extra motivation. Thanks for letting us know.