Thank you.
Here is my friend's build log of the predecessor model. It weighs 211g.
http://sfc.pro.tok2.com/kosaku/DL-A4L/toki.html
It has slightly large wing area and he used four 11g servos.
My plane's wing is 93g and I used three lighter D47 and one 9g servo.
So I could save weight,
Due to Japan's mild climate, many flyers prefer light sailplane.
Many of them uses 1 cell Lipo with or without booster circuits.