1. Replace the content of the Custom Data of Programmable Block - GUI with the following:

DisplayName=Projection;Programmable Block - Projector
Projector Selection
DisplayName=Previous Projection;up
DisplayName=Next Projection;down
DisplayName=Select;select
DisplayName=Apply Changes;apply
Welders
DisplayName=Start Welding;[group:Welders:OnOff_On],[group:Piston - Projector:Extend]
DisplayName=Detach Welded;first:Small Merge Block - Detach Projection:OnOff
DisplayName=Retract;[group:Piston - Projector:Retract],[group:Welders:OnOff_Off]
Welding Options
DisplayName=Welders ON/OFF;group:Welders:OnOff
DisplayName=Pull UP/DOWN;group:Piston - Projector:Reverse
DisplayName=Speed DOWN;[group:Piston - Projector:Velocity:$-0.1],[first:Programmable Block - Easy Automation:OnOff_On]
DisplayName=Speed UP;[group:Piston - Projector:Velocity:$+0.1],[first:Programmable Block - Easy Automation:OnOff_On]
DisplayName=Projection OFF;group:Projectors:OnOff_Off
Control Panel Options
DisplayName=Retract;first:Piston - Control Panel:Reverse
DisplayName=Auto-Retract ON/OFF;first:Sensor:OnOff

2. Group all the pistons for the projector arm in a group "Piston - Projector" (Piston - Projector + all the added pistons)

3. Recompile Programmable Block - GUI

4. (optional) Set the speed of the newly added pistons to match with Piston - Projector,
add new pistons to Reverse Piston - Timer Block