If it's true that as per
this post the additional MP provided by a partial wing do not generate heat when used...then how does that work for intermediate-length jumps? Or to put it another way, at what point am I actually considered to be actively
using that bonus?
Example: Let's say I have a medium 'Mech with five standard jump jets and a partial wing. It's operating in a standard atmosphere, so it's eligible for a +2 jump MP bonus -- it can jump up to seven hexes, which normally would build up 7 heat by the pre-errata stock rules (1 heat per hex jumped, though with the partial wing's heat dissipation bonus then also being applied during the heat phase), but the errata reduces this number to 5. So far, so good.
But what if it decides to only jump, say, five hexes instead? Does it build up 5 heat as normal, because it doesn't actually use the extended maximum jump range? 3, because I can claim that only three of those MP actually come from its jets? Can I choose to deliberately split the difference and have it build up exactly 4 because that's just what the triple-strength myomers ordered?