7-Segment Digit Display Calculator

[KeePaa]

Hi, my name is KeePaa, and I work with redstone, I don't know everything there is to know, but I do know pretty basic stuff.
So, I was planning on building a Calculator with redstone, the 7SDD will be piston-powered, not by lamps.
The Calculator itself will only have + & - functions. There will be numbers from 1 - 9.
If anybody wants to help, feel free to say in the comments.
(I won't be using any observers, only pistons, torches, redstone and wool (plus, ya' know... repeaters..))

 

[UpperGround]

if you want i can make a great cıvering for it,
i suck at Redstone but im decent at building

might help aesthetically

 

[Disaalt]

lag server out but

yeah i can help

 

[Oh_myMinecraft]

gl on making the calculator

 

[keiko]

yeah sure i can help

 

[Silver Wing]

GL