Basically, TK6.0 mainboard or TK6.0s mainboard can be used in your Heng Long v6.0 tanks. But the TK6.0 smoke generator unit does not work with the TK6.0s main board, and vice versa. You may need to figure it out that your tank is using TK6.0 or TK6.0s before replacing main board.

TK6.0s+Smoke Generator Unit upgrade set