Here are the weights of my recently received Impact.
It was weighed on a food scale before any of the cutouts were made and with no accessories or subassemblies attached.
There may have been a few pieces of the masking tape still attached:
Weights are in grams-
Fuse only 736
Canopy 102
Chin 68
Rudder 88
R.stab 112
L.stab 113
R.wing 457
L.wing 463

JLK