Do upgrades stay as the plane is converted?

[Tha_Ape]

Hi,

can't remember if the upgrades (hushkits and now winglets) are "transferred" when we convert a plane, or if we need to upgrade the converted plane once more?
Can someone please tell me?

Thanks!

Arthur

[Sami]

Upgrade is model-specific. Conversion changes the model, so upgrade is lost. But I'm looking to change this (conversion system is partly incomplete).