For the time being, he had no means to inflict damage on his own Train Armor.
When the chance arises later, he'll take another look and see what this rapid recovery is truly like.
It's worth mentioning—
When accessory levels reach Level 100, there is no absolute level suppression anymore; a Level 101 main cannon cannot damage Level 102 armor, but the damage dealt is just not as high as it would be against Level 101 armor.
Everything is calculated according to the energy range.
When the attack energy is lower than the defense energy, it can still cause damage, although the damage will be relatively low.
This gives rise to the possibility of many ants biting a pachyderm to death.
A sufficient number of Level 101 main cannons can slowly wear down a train with Level 121 armor; of course, the greater the level difference, the lower the damage, if the difference reaches Level 20, it's essentially akin to no damage at all.
