Hey Byron I have no issues with 4 colours out on a 9 colour reel. I even clip the leadcore in my inline boards with no problems so far. I start with 25 or 30 feet of flouro leader so I can retie a few times before I need a new leader.
The issue with that setup is that you have leadcore from your rod tip to the board which is heavy and tends to drag the boards sideways or the line dips into the water. It works if the line is short but if you run your board further from the boat the line will sag and catch the water which is all bad....