2012 design update:
The developement of the EC12 System Board radio and sheetline installation should be explored with the J Class boats for the same reasons used in the smaller model. This design has proven beyond hopes and provided reliability and ease of maintenance. It can be adapted for the model and building process shown here. EC12 System Board.
The internal gear is simple and uncluttered. A radio rack will be mounted on the primary ballast at the strut tower for the winch, trim servo and power switch. This will be removable with one screw. The rudder servo will be on a board within its own compartment at station 70. The antenna will be internal in a tube.
The aluminum was laid out, cut, drilled and formed. Yeah, I know, "Did it work the first time?" No, a second one was built.
The mounting tab is 3/4" and the rack is 4-3/8" tall from there and 4" wide. The mounting holes for the winch were 1-1/4 above the break and drilled according to the RMG manual. The winch and the servo were set aft of center for room in sliding onto the strut tower. Think about it.
Note the center hole of the winch. The 1/2" drill wants to chatter even after pilot drilling. Go slow, real slow.
The rack is to be fitted to the strut tower forward with two slide in slots to pan head screws. The rear mounting is slotted for alignment of the winch drum with the bow turning block. There is a cap screw and to tightened with a ball hex driver. The compression strut portion of the sub-structure section shows the fitting of the rack.
It might be noted that the linkage separation from the servo arm and the tiller was tight with the servo positioned here. A extra 1/4 to 3/8 inch further away from the rudder shaft will provide ample room for the linkage.
It should be noted with this wiring that the positive (red) wire of the rudder and trim servo leads to the RX need to be removed from the plug (severed will work). This is because the winch is supplying power to the RX .