I have a 228 with an after market top and went with the Taco 280 roof mounts and 20' Lee carbon telescoping poles. After much consternation and advice from this forum I had a welder to install the Taco base plates and additional support tubing, it is rock solid and highly advised. I can keep everything up while running and I was amazed how solid it was. I only trolled offshore a couple times this summer and no problem running 6 lines, 2 each from the long and short outriggers and two flat lines from the transom holders I added, one flat WWB long and one flat with a swimming plug short. I'm sure I could run two more from the rocket launchers but I was solo and that would be too much work and a possible disaster in a multiple hookup or a marlin were to go crazy through the spread.
Check out Sterling tackle wide tracker spreader bars, they are the rage on the east coast for small boat tuna. The center of the bar has a bird with a diagonal fin on the bottom that pulls one bar to port and one matching bar to starboard. You can fish those from the gunnel and get the same spread as a big sportfishing boat but for best results you run them from the long rigger which gives you a huge spread.
I rigged my poles with double halyards which is convenient for fishing but a royal pain for storage. This winter I'm converting from two separate halyards to a single halyard with two release clips on each line. This will allow me to easily remove all the rigging and coil it up when not in use.