Please critique my home front-end alignment method

Ironracer said
You could pin the metal Yer using fer the tires to turn on and take Inkzall "Milwaukee tools" and draw out ° "degrees' with a Speed Square....

Make yourself a pair of slip plates with some old tile or something..put some grease in- between... then the suggested speed square or such and mark out center and then + / - 20° I used that and string (front to rear...and. plumb bob vertical)

Good luck