Database - tactical theme

Currently I am building a database on one tactical theme 'Piece defelecting' (source theme artistry by E.A.Furst). I loaded about 220 positions and it took me about 10 hours to create the positions and save them as pgn files (with clean-ups). I might do the same with rook and pawn endings as there some 6 piece endgame databases freely to find on different websites. (thank you tempo)I will incorporate this in the circles. In this way the knowledge can be converted into ability.