Yes, it is "nearly four pounds". If I recall, the 5" is OVER 4 pounds.
Weights. 3.53 lbs, 3.75 lbs, and 4.2 lbs.
And here, you said the deck was a few ounces heavier than a TSI, where a TSI is just under 4 pounds.
You just straight up lied on your own page. The deck may weigh 2.5 pounds...