TSS4 is brilliant for spinning 4kg line try to ensure you run full rod lenght of quality 30lb leader tied direct to the braid DO NOT USE a swivel and be prepared to replace line often or cut all knots after fishing and tow the line around for a while to smoothe out and unwind some of the twist. Best weight slug I have found has been the 40g but you do not specify what weight / length rod you will be useing.
pelagic_chaser