What Cubes are this? + General Questions

[Deniz`]

Hello,

Can anyone tell me, what kind of Cubes those are, please?
Cubefans: Cube4you 3x3x3 Speed Cube
Cube4You: Cube4you 3x3x3 Speed Cube(White)
(I know its the same Shopkeeper)

I wanted to try a (Type D + A Core + Good Screws+Springs)

Can i purchase this: Type D + this Old Type A Core ?
And what Screws+Springs do i need? (Or are the included ones Okay? Or are the included ones only SOMETIMES okay?)

I own a original Rubiks Cube (not for Speedcubing), which i dissambled, lubricated(i bought a Silicon spray from a market), but i cant get any feelable improvements. What happened?
1.) The Silicon-Spray i bought is ****?
2.) Silicon-Spray in general doesnt bringt much improvements on original Rubiks Cubes?
3.) Should work, and i made a mistake, while lubricating?

What Lube can/should i buy? And where?

I would like to buy anything in ONE Shop, to save shipingcosts and to receive everything at once. Where to buy what? Please help me.
I am realy lost.

Thanks and best regards,
Deniz`

 

[Stefan]

what kind of Cubes those are, please?
Cubefans: Cube4you 3x3x3 Speed Cube
Cube4You: Cube4you 3x3x3 Speed Cube(White)

Those are Cube4you cubes.

 

[Yes We Can!]

You can order a cube and choose the option 'lubing + assembling'
It costs 1 dollar

 

[Deniz`]

Which shops provide this? C4U?

And i need more informations about the Screw+Springs, are those good ones, for a Hybrid (Typ D Cube + Typ A Core) ?

 

[Yes We Can!]

yes, c4y
doesn't they fit in every diy core?