The Top and Bottom ends of a bay now have extra options to choose.
The Top end includes following options:

• Spigot - the default value - uses standards with spigots
• Open -  uses open standards at the top
• Head Jack - creates head jacks in one at the top standards
• Base Plate - creates base plates at the top standards

The Bottom end of a bay now can be set to following options:

• Open - removes all base plates
• Head Jack - adds head jacks at the bottom
• Base Plate - adds a base plate by chosen type (steel or timber)

Top and  Bottom jacks offsets now can be controlled by  the Top and Bottom extensions options respectively (a numerical value of the offset allowed to be typed). 
Once top and/or bottom type of an end defined, any type of a base plate now can be directly rotated from the Bay tool dialogue.