Bulk prime with fresh wort

[osprey brewday]

Any one bulk prime a previous batch with wort from a fresh batch if so any ratios for gravity/ mL/ Lt. Or is it not a good idea i have read that people use dme so thought it would be sort of the same thing.

 

[MHB]

Braukaiser covers everything you need to know to about Kraeusening.
Very well explained and worth working your way through the whole section.
Mark