I really don't have any tips other than to take
your time and build it per the instructions. This
is kind of a busy kit, but the end result is a
beautiful flying sport aircraft and a great
looking aircraft. I have built two of these and
powered one with an OS 1.20 twin and the second
one with the Saito 1.50. You will have plenty
of power with the Saito 1.80. I do have one tip
regarding the ABS cowl that comes with the kit.
I would recommend getting a fiber glass cowl, the
ABS will start cracking over time unless you have
it completely lined with cloth fiber glass on the
inside. Also, I found that the braided wire
tail supports will also wear through and break
over time due to the vibration from the engine.
.065 (I think) push rods or other more sturdy
tail section supports would be advisable.

Good building, you'll love the aircraft.