yes i know the point is he was lucky to find a jump upgrade of 40 for that engine and at the same time he was unlucky to find a engine of higher tech that upgraded for less than 40 jump
i thought the question is why he cant upgrade a single engine to jump higher than 40 and i think the answer is u wont be able to change upgrade bonus of any equipment (both type of upgrade bonuses are fix when the equipment generated) the only thing u can do is to buy another engine (and doing the same type of upgrade
)
and i should actually say for engine (or any thing that have 2 type of upgrade) the equipment generated with its 6 possible upgrade (3 version for how much money u want to pay and 2 type speed and jump for a total of 6 )