I have a manto 3.0. I thought about reviewing it but it is not really available anymore. However, i recently saw a manto-x review that indicated that the sizes and dimensions are unchanged. I have measured mine carefully to help me communicate with gi makers to choose my next gi.
a3 must be flippen HUGE on you! I am 6'4 and 194lbs and the body is loose on me. The arms went from a bit long, to absolutely perfect for my long arms.
I don't think it shrank a heck of a lot, though. About 1.5 inches across the total wingspan. I believe A3 is 70' out of the bag. Mine is now 68.5 after 30 washes or more. I don't own a dryer, but I was trying to shrink it, and I did wash it on a piping hot "medic rinse" setting on my washing machine.
I really don't think you will get the shrinkage you need.
If anyone else is interested, I can say that the model I have is rock solid, has a thicker collar than many of the gis that my club-mates are wearing.
They certainly do run large. The a3 can definitely fit a person up to 6'5 and probably remain legal in the arms. The pants are long enough, but not crazy. well-washed my a3 pants are 39.5" long on the outer leg. The skirt is long. Under my ass long. I'm 6'4 (192cm). A guy up to 220lbs could easily wear manto a3.
If it is of any use to others, here is a diagram of the dimensions and pics that indicate the fit. A3 on 6'4 194lbs
https://www.dropbox.com/sh/vq45gaw5d8mmtdc/ABORAHb-gy