When setting up the straight bar you must ensure the the bar is always in a level position. This is done by obtaining level on the bar using smart level and cutting a piece of wood to support straight bar.
The gear leg spindle mount must be drilled and tapped for a locating bolt (AN3) in order to hold the position of the gear leg spindle mount prior to the drilling of the gear leg in a later operation.
Once the gear leg spindle mount is propperly located & locating bolt secured, you can apply alignment marks onto the landing gear leg and spindle mount for a positive verification.