Some of your guesses on the measurements, and mine aren't that far off, and some are quite a bit off. Both of his g3's are over 10" for sure IMO. I would say 12's, but I'll do 11's to be conservative. lol the beams look like 23 minimum to me. His bases, and H2's are actually pretty good. Compare them to his eyes. Some angles the H3's, ad H4's look bigger, and some angles look smaller. I might have been too generous on them, but I'd say slightly above average mass at H1'S, and h2's, and average at H3's, and H4's. For a 3.5 year old. I'm gonna revise My score to:
Main Beams 23-------23
G1's 6------5 6/8
G2's 9 4/8------9 4/8
G3's 11 ------11
G4's 4----------6 4/8
G5 ------------3
H1's 5 2/8-------5 2/8
H2's 4 6/8-------4 6/8
H3's 4-----------4
H4'S 3 6/8-------3 6/8
That still comes to 163 2/8 for me