Nice info! Inspired me to take comparison pic of the Leopard 58110-950 and a TP5670; Leopard has those loose windings too. The TP5670 in the pic is the one Lizard got from APS for his Slash; I removed the sensors it was fitted with by APS, hence the 3 glue spots on the coils.
Does anyone have a pic of the 2028 coils for comparison?