Exactly. We're in agreement here. This was His true, own, personal body, flesh: but not unchanged.
As Paul explained (1 Cor.15:35-58) it's like planting a seed and then seeing the sprout come up. The seed is wheat. The sprout is wheat. The seed is tiny, hard, dry, inert. The sprout is flexible, green, rooted, juicy, transpiring, growing. They are the same thing --- they have the identical same genome--- but they have different characteristics:
42 So also is the resurrection of the dead. It is sown corruptible; it is raised incorruptible. 43 It is sown dishonorable; it is raised glorious. It is sown weak; it is raised powerful. 44 It is sown a natural body; it is raised a spiritual body.This "spiritual" body is still flesh -- the same flesh that was born of the Virgin, was crucified, sweated and bled and died and was laid in the grave, solid, tangible, wounded, man-flesh, NOT A GHOST --- but flesh now SUPER-alive, perfected and glorified.
Paul is discussing our own resurrection into glorified bodies, after we die and “become as He is” — not Christ’s resurrection, of which John said that “we will become as He is” but we do not know what He is in His glorified state now, “because we have not yet seen Him” in this state.
Two different resurrections.
The “Resurrection of the Dead” is ours, or all believers in Christ.
Christ’s Resurrection is not what Paul is discussing here.