Hi. Mavros
my YS 175 is still new engine and needle is way open for break-in with 18.1X11 APC prop.
I think, Invitation model is able to fly with YS 140 power. it is finshed weight is 4,740gram with out fuel. It is very light !
personaly, I like glow power a lot....
And following planis trying to use YS 185 Zero nitro engine. It will be another fun part.
alcohol fule price is low as gasoline price.

Alex W. Shim.