Dover manager Jake Leberl is open to adding reinforcements to his squad. Whites find themselves well-placed in the Isthmian Premier play-off positions in the early stages of this campaign. But Leberl has been disappointed with his side’s past couple of performances – a 2-1 home league loss to Wingate & Finchley last weekend coming seven days after they had rescued a 1-1 draw at Carshalton in stoppage time. Ironically, midfielder Jaiden Drakes-Thomas, who only left Dover in late August, made his Crabble comeback with Wingate. And Leberl, whose troops were due to play a friendly against National…