As rough as it sounds..... I take my bar and put it on the seat of my truck in an empty nuc, with the engine running and heat on, then pull each cell as I need it and slide it into a brood frame and re install that frame. Then go get the next hive ready, pull the cell and install it etc... Not sure if you have a bar with cells on it or if you have a frame you want to cut cells out of.. A quick transfer will be fine as long as they are not sitting out in the cold while they wait to be placed.