Help request for new set up (1 Viewer)

Help request for new set up

Hi

I am going to order a projector and make my own screen using a sheet of dry wall
and the special paint.
My screen will be 4 feet tall

I have a few questions.
Below is the projector I am thinking of getting and the mount.

My ceiling is 88inch

1, If my screen is 4 feet tall how wide will my image be?

2, How far from the screen do I put the projector, and do I measure from the front of the
Projector or the middle?

3, will this mount work for my situation?

4, How far down from the ceiling should the projector be mounted?

Any other advice or tips you have are appreciated.


CHIEF iCPRIA1T03 Universal Projector Ceiling Mount
Model #:ICPRIA1T03





Acer H6510BD FHD 1920x1080 (Up to 300” Display Size) 2 HDMI Inputs w/ Carrying Bag 3000 ANSI Lumens 3D DLP Projector
Model #:MR.JFZ11.00A


ACER

H6510BD
· Full HD (1920 x 1080)
· 10,000:1
· 16:9 (Native), 4:3 (Compatible)
· 1.15 ~ 1.5:1

Thanks
Howard

Projectorcentral has a calculator.The owners manual also has this information.