Hi, Ihave just got my first couple of flights on my WACO fitted with the SAITO FG-20 at the WAMASC airfield in Perth Western Australia.
The flight took place in gale force wind, but was OK. The aeroplane fly very well, but did require fair amount of trim (still to be investigated on better flying day) and landing was challenging as the aeroplane kept floating (maybe the wind didn't help).
I posted few photos showing the FG-20 setup with the tray for the ignition. I am using Eneloop 6V for the engine ignition placed in the area behind the fuel tank to get the balance correct. As to appearance, it is probably better to use the 90 degree bend for the exhaust which will get it straight backwards. I am using the Hobbico LiFe Source battery for the radio also located behind the fuel tank.
The radio is JR 11X with JR9ch receiver (one of the photos show the receiver "tray" glued to the side). The the LiFe Source battery is plugged into both battery and empty channel into the receiver using two switches for redundancy. Each Aileron uses its own separate channel, and one channel is used for Optical Kill Switch for the engine.
Ididn't used the supplied fuel tank which is way too large for petrol engine as there is no reason to carry around all this weight in fuel. I also didn't yet used the dummy engine, but may install it later.

I am very happy with the flying characteristics. It is very scale with the FG-20 and 15x8 APC prop. Iwouldn't mind a bit more power and will try the APC 16x6 to see if it is a better prop for this aeroplane, but only because Iwould like to do some non-scale manoeuvres..

What Ididn't like:
1. The landing gear fibreglass cover already cracking after two landings.
2. The wing bolts holes were in the wrong location and had to be filled and re-drilled
3. The fit of the wing fairings is not good out of the box.
4. Iam sure that Great Planes could have find a way to supply the wing joiners with the lock-nut permanently attached.

Overall, if you into scale flying, the FG-20 is quite a good match for this aeroplane.