Too easy. The skill is connecting with one piece less than you'd like. Main problem with roads is there is hardly any worthwhile advantage going to the trouble - the gold is pitiful, they don't speed your defenders in to action, don't make building construction quicker.. etc.etc.
IA 650% + 10% bonus, 10,640 per hour - still have some buildings to do yet. Only one not connected - a tower stuck in the corner, love it when a full on attack gets to 6 seconds left and they are wondering why they are about to lose their army (not that it matters much with TB)