Radio and tank installation in fuselage.

I have deciced to install tank near centre of gravity.
Rudder will be connected to servo with a pull-pull system, operated by two kevlar leads or similar. The leads will cross inside the fuselage.
Elevator will be actuated by MK elev coupler. There will also be a pull-pull system between the coupler and servo. From the coupler to elevator halves movement is driven by 4 mm carbon fibre pushrods. Pushrods will have ball links 2 mm thread.
Horns on control surfaces will be of 4 mm CF-balsa-CF sandwich that a friend of mine has produced.

	Place for radios and tank. See 3x3 balsa guides to help position the servo tray. Pattern of servo tray was made of cardboard. It is easy to trim and fine tune the shape. The wing fixing was already made in the Sombrero kit, saving a lot of work.
	The servo tray. Material is a sandwich plate made of EPS stryrofoam and 0.4 mm plywood on sides. This sandwich is quite light, not as light as CF honeycomb but not as fragile either. All glueing done with Cascol PU glue. Weight as 39 g finished, where the glue weight is 5-6 g total.
	From the other side. See glue expanding and filling possible gaps. It is important that the cross support is glued on both sides of main plate. In that way the surface does not come off when tank is exposed to high g forces.
	Note reinforcements for servos made of 2 mm ply or 6 mm ply for elev servo. Elevator servo is located higher so that its pull-pull cables do not hit rudder servo arm nor cables. Tank mount and auxiliary supports have been tested with 10 g load. No problems. Tank will be secured in palce with either rubber bands or straps. Even if they fail the tank stays in place since wing is blocking the way.

	One way of attaching receiver. This absorbs vibration and is easy to use. Also the servo leads will be tied with rubber bands. This is where the holes are used in addition to save weight.
	Equipment dry fitted before glueing. Sometimes you find things to correct, so rather check than be sorry.
	Two trays. Another one is for the backup plane ;-)
	Servo tray is glued in place with Cascol PU glue. Task would be easier with epoxy and micro balloons as PU glue is very slippery. Servos are already bolted. See huge HD switch from Futaba.

Compliments to all who has contributed to this. Much of information has been gathered by searching the Internet and following
other enthusiasts' projects. That is also motivation for publishing all of this.