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. . .If I understand correctly I need a tube welded in for the throttle cables,wiring harness, and power cables to go thru then a sleeve goes over all of it to the motor and it secures with a clamp around the aluminum tube that is welded in. Sorry for all the questions but on this website everyone is so helpful even with my stupid questions. Thanks again.
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Adam, like I used to tell the guys that worked for me, no such thing as a stupid question . . . only stupid mistakes!
Your understanding of the rigging tube assembly is correct, assuming you want to rig it like Don Herman does. You could just drill a hole in the bracket and secure the tube with epoxy, but if you're having one made up, seems like it would be cleaner to just have one welded in before they powdercoat or paint it. You'll still need a smaller hole for the hydraulic steering lines.
Regarding trim tabs, I use them primarily for lateral (side-to-side trim). A deep-V will tend to lean into the wind; the wind blows you off course, so when you crank in some rudder to correct, boat will roll in the direction you turn the helm. When you lay a deep-V on it's side, it's NOT a deep V anymore! When waves are coming at you at some angle off the bow, rolling the boat just a few degrees AWAY from the waves with the trim tabs increases your deadrise relative to the waves and will create a big improvement in the ride! You can do the same thing by moving gear or crew around, but the tabs are more convenient. I also use a Doelfin for fore & aft trim, and on a 25" motor on a bracket, it makes a big difference. Also if you're stern heavy, a 4 blade prop will also give you some stern lift.