pdf page 5, the Spindrift is overweight by 2.5 tons due to incorrect patchwork armor weight calculation.
Here's what TO says on how to calculate patchwork armor weight:
The designer of a unit must designate the armor type to be used in each hit location and, using the Fractional Armor Table on page 376, compute the weight of the armor by multiplying its weight (in tons per point) by the number of points assigned to the location, rounding the nal
result up to the nearest half-ton. This is done per location, with excess points per location discarded.
The writeup says the following:
The Spindrift’s curious mixture of armor protection starts with four tons of patchwork armor. As lasers and
torpedoes are the most commonly used underwater weapons, one ton of laser reflective armor has been divided
between the left and right torsos. Since the Spindrifthas no arm-mounted weapons, its arms have been configured
to test the efficacy of reactive armor underwater. As with the side torsos, a single ton of armor is shared between
each arm. Two and a half tons of heavy industrial armor protect the ’Mech’s head, center torso, and legs.
It's calculating per type of armor, not per location.
