I found some time to place radio equipment. The rudder is moved with a carbon push rod, all the R/C equipment except batteries sits in one float, the battery is in the other float to keep weights balanced.
I will go for a set of easy sails and hope to launch at the weekend.
Here are some pics from my last progress.
some views of R/C installation
rudder with pushrod attached
top view with all rc installed - you can see batteries are in the right float, while servos and receiver are in the left float
Have a nice day