what do you want to know, it's a mag drag isn't it,
1)dont over load the spool, multipliers can bite if you do and the only thing you can do is spend hours unpicking the birds nest with a pin,
2) when you start turn the mag up full and then adjust it down wards each time you cast untill it just begins to over run. (see point 1 for consequences of starting too low). then put it up half a notch.
3) keep it clean crud getting into the spool will soon kill it.
4) keep the bearings well oiled this does not mean flooding them with oil too much will slow the spool.
5) keep your eye on the sea fishing mags they do good articles on tuning multipliers for distance casting.
6) you could have asked this question in the pike fishing section i would have found it quicker
