I think the full plug works so well for several reasons,---1 is a straight deep cut does less damiage than prying and bending the grass it seems the prying and bending busts the roots or somthing but digging a deep cut and taking it out actually harms the grass less in fact i just dug three new plugs a 3" 4" and a 6.5" and could not even tell where i had dug them . the slit even damages the grass when i pry up it breaks roots and some grass turns brown, so i was amazed I will probly start using full plugs for coins over 5" deep you just have to pack the dirt back in befor placing the plug back and i will pluck a bit of grass to aid in nitrogen releas. humm I guess i did not know it all ?