Modern Vespa

Everything's the same as a PX. Chassis is PX with a welded square ass and floor mats instead of rails. Different are the engine, headset / fork combo, tail light, horn cover, front fender, seat…

Yes. Front hub/brake plate axle is 20mm(EFL type).

The typically hard to find accessories for a T5 body are the seat, the spoiler, the speedo.
The spoilers sold by Piaggio are in fact LML, and are gross. Not the same color usually, and they have little recesses for reflectors. If in need, get aftermarket such as RMS; they're not as well finished as the original, but they at least look like a T5 spoiler.

The rear bumper is still available as a Piaggio part.👍

The seat is a major hassle to find in good shape, and the SEA repops (usually with T5 printed on both sides as well as the back) are more upright than the original, and don't follow the line of the frame.

Spanish (Motovespa) seats could be an option, but they used a PK-style closure system, whereas the Piaggios sold elsewhere had a PX-derived system, which I noticed you have on your frame. The seat can be modified to take a lock suitable for your frame, or you could drill 2 holes in the frame to take a PK latch. Reason I mention this is that it might be easier finding decent shape seats in Spain, and I personally prefer the plastic and foam construction to the heavier, bouncier Piaggio seats.

I found an used oem seat in good shape im going to call the owner to buy it, the lock system you highlighted in the pic is lose, does it mean there's a problem with it?

Thank you, there's a shock absorber missing from the bike is it a shared part then?

It's normally screwed into a nut welded to the underside of the frame. Start by checking that.

Oh, and yes, PX and T5 use the same shock absorbers.

If youre talking about the thingy on the back of the seat you showed in the screenshot above, it is there but it's loose

Yes. PX shock will fit.

Well classes are over and I'm starting to work on the vespa. Any tips on how to remove the plastics, and the exterior parts I'm disassembling the body parts. Is there any YouTube videos I could watch, I'm currently waiting on a screwdriver to be able to look inside the engine.
Other than that I'm really scared of having to do electricals on the new chassis

Try using the search feature if this forum, as there have been atleast a few T5 restorations with lots of pictures. Even a P-series restoration would have alot of useful information which would mostly apply to the T5.

Considering the condition of the scoot, you very well may need a new wiring harness and more. Wires and switches oxidize and wear away just like the rest. Also, if doing extensive welding to the frame, it may be required to pull the harness anyway; so it doesnt melt.

There are plenty of references to get your electrical system back to new.

You'll need a good set of metric tools, some factory tools, and research research research. Search is Your friend.

T5's are rad. Decided to repair or replace frame?

Thank you, I've decided replacing for sure, but I've been looking for chassis i could use, I even considered sticking the engine on a px, but I'm not sure if I like the idea, there's a px200 that hasn't been driven at least in months in my building and my uncle's got a px50 he doesn't use