Quickly create holes in mesh (without live boolean)

Option 1:

• Append an object
• use an insertcyclinder brush to insert cylinder in the center of object by alt-click-drag
• Because you hold down the alt key and because the object you want to create a hole in is a dynamesh, it will subtract*
• drag one to get rid of the mask
• drag it again to create a hole

*under display properties, you have to make sure that the cylinder has "double" selected


Option 2:

• create a mask
• create a polygroup (ctrl+w)
• ctrl+shift+click to hide polygroup
• then "Delete hidden" under geometry
• curvebridge brush to bridge both holes
• drag and hold shift to snap to edge
• re-dynamesh