Related to weapon costs being integer and/or float values, Melee Attack Bonus and MC Costs have bugs. I have a mech with +8 for Tier 2 and +1 melee from Powerful Arms (+9 total). For some reason, regardless of changing these values it always give a +16 to melee, not counting operator bonus. When the cost is an integer value on a new sheet, the bonus comes in as NaN. Changing it to a float value makes it +16, and it does not seem to update with further changes. MP total seems to have some calculation issues. Discovered when weapon costs were a mixture of integer and float values, but it may affect elsewhere too.