Hi guys, nice work you are doing with the model.
I am the one with the green "flying brick" you see if you followed the link. My Tucano have had lots of flights now, and maybe i can give you some advice.
First of all. when you stated that the incidence was 5 degrees up, i guess it is correct. I still had to trim the elevator a bit down.
About your 1.20 engine. I think the extra weight in the nose will do you good.
Here in Norway the Tucano was sold as a 0.90 size
About the aluminum wing joiner i am sure it is way to weak as original. Just imagine the force this pipe has to deal with if you are in for a little rough landing. With the main wheels mounted way out on each wing,the weight of the whole fuselage rests on 3-MM each side where the tube enters the fuse.[&:] If this tube gets just a little kink where it enters the fuse it will most certain fully collapse in a hard g turn or hopefully next landing. I made a hardwood rod that i forced into the tube with a little glue. This way i made the tube more solid. I noticed that the side of the fuse where the wing root rests was not a flat, but quite rounded on my Tucano. I sanded it better, and then filled the gap with Hysol to make a tighter fit. This also helps distribute the load away from the wing tube.
After a lot of flights i noticed that both wings where a bit loose. (before i made the sanding of the end of the wing fillet.) Inspection showed that the wing socket inside each wing had worn enough to move each wing 10 mm. I had to cut through my beautifully glass finished wings to get to these sockets. It proved to be cheap rolled up cardboard tubes. A little water inside will be harmful to these.
I made new ones of epoxy/fiberglass .
The lighting system you PM'd about is from electrodynamics.USA
http://electrodynam.com/rc/
This makes a lot of spaghetti inside
but is easy and fun to make. I made thermoplastic covers for the lights on the wing tips. These diodes is so bright that you gets dazzled even outside in a sunny day.
I made MPX connectors and the wires together with supply common wherever possible. Just separated where the ones operated from reciever (landing lights comes on with flap)
Theese LED's drains a bit of current so i reccomend separate battery for this purpose. I have a 4.8v 600mah battery wich lasts for about 1 hour.
I also used EZ air connectors. When the wing is in place the air is connected. If you use spring air and no wheel brakes i guess you don't need it.
Are you planning to mount the extra fins at the lower point in the tail?
I did not because i was afraid to mess up the angle and make it fly worse.
Happy landings
Tor