Yeah, there is no issue doing that. Most modules do that. I just tested it, I got the hook wrong use,
public function hookdisplayTopColumn($params)
{
return $this->hookLeftColumn($params);
}
And then unhook it from the left column, and hook it to the top column. It will look like this, http://thirtybees-200675-702960.cloudwaysapps.com/coffee-and-tea and need to be restyled for being in the top column.