Hi Vector ,You can harvest up to 3000 grafts without ending with a patchy look.( I am talking about someone with good beard density ).
After Beard transplant , some characteristics such as hair length usually change but others such caliber , texture of beard don't.Beard are rougher than scalp hairs when you touch them .That sensation won't change .That's why we often encourage to use this type of donor when they look as close as possible to scalp hairs ( Matching protocol ) .