SPARTAN-II Measurements without augmentations

Going by Master Chief as an example assuming he’s about average for a SPARTAN-II, how much poundage do you think the augmentations as a whole stack on?
I think I’ve got the Carbide Ossification process nailed down.

At 286 pounds, if he naturally weighed this much without artificial intervention, his skeleton would weigh approx. 43 pounds assuming the human skeleton is about 15% of human weight. However, if the augmentations increase the mass of each bone by 3%, and there are 206 bones in the human body, his skeleton would be unnaturally heavy due to the ossification. Each bone in a 43 pound skeleton would weigh .20 pounds. But due to the ossification John’s skeleton would be roughly 18% of his weight, making his skeleton 51.5 pounds after this, meaning without the heavy–Yoink- ceramic-coated skeleton he would be closer to 277 pounds, and this likely has a lot to do with his height as well, if we took off 4 inches he’d loose another 21 pounds gained from height due to bone growth, which would knock off a good 15-20 pounds were it not for the bone enlargement, bringing him down to about 262-258 pounds biologically.

I am sure another chunk of that would be lost if he hadn’t received the muscular enlargement drugs. Osman as an example was about 6’2 due to not receiving hers’, and would have probably been closer to Palmer’s height of 6’9, so we can assume he’d be even smaller at about 6’3 and closer to 200 which I think is the last of his size-increasing augs. What do you guys think? Anyone care to make some corrections/adjustments to these specs?

EDIT: Also take into account humans are a good 4" and 60 lb. heavier on average, overall physically larger, than modern day humans in the mid 26th century/Halo-era, so the amount of weight stacked on per-inch might be different than modern day measurements. Could make a difference, possibly.