iPhone 7 plus hardware upgrades

Hey guys,

Has anyone tried to upgrade their iPhone 7 Plus hardware

for example

Switch the 32 gb logic board with 128gb logic board.

or

Try and upgrade the iPhone 7 Plus logic board with that of iPhone 8 Plus?

or

Try and upgrade the camera on this phone with that of iPhone 8 plus

are such modifications possible and has anyone tried it?

it would be a cool experiment to go about with.

please share your suggestions and experiences.

Ps: I got this idea after watching videos on YouTube where people are building there own iPhones for half the price.

I thought if I could update the hardware on my phone by purchasing some parts of the iPhone 8 Plus may be including the housing unit.