RE: who makes this boat?
Brandon,
you have the lines done correctly, pressure and carb are fine and the one from the lower unit to the head is your water coming from prop blast and other side is your exit.
as for the trim tab on the left sponson, there should not be any, tunnels do not use trim tabs.
Checking on Hull and servo's.
Servo's:
HS605BB has 94oz/inch of torque @ 6.0 volt and 76oz/inch @ 4.8 volt.
FP-S148 has 33oz/inch of torque @ 4.8 volt and 42oz/inch @ 6.0 volt
I would suggest you use a 6volt battery pack to get the most out of the servos, the 605 should be ok for the steering but I do prefer over 100oz for steering, however I have use 94 to 97oz on my .21 with no problems.
the steering servo should be fine also. Remember, 6volt pack (not 4 batteries but 5) running 4.8 will put you in the lower oz/inch torque bracket and would be looking for trouble.
Dan.