Grayth.....thanks for the Spreadsheet! Found it quite interesting as to how you have arranged everything. Not sure I would know how to read it though.
One reason I developed the Pick 3 software that I have is to simplify (to me) all the input as to Hot, Cold, Due, Dead, etc. I dont even give any consideration to things like that although it could be a part of my process and I dont recognize it as such.
I maintain a very simple Chart for Level of Play (Games out) using a 13 column Accounting Ledger. I start out by using the 2nd line on the ledger to write in pencil the 3 digits that play each day.
Then on the 2nd line the digits from the previous days game (with or without) any repeat digit. Then following by the remaining digits depending on how many days it's been since they last played.
By the time you get to the 5th row on the ledger (which for my purposes is 4th game out) that becomes the dividing point for consideration of Hot/Cold I would assume. The Visual Chart is graphic in nature and helps me more then a spreadsheet type chart as I can see how long it's been since a digit 5 or more games out has played.
Knowing that most digits will play by the time they go 4 games from whince last played, the graphic chart helps me to see what digits havent played within that period of time.
Whenever a digit plays on a particular "level", I mark the level in pen with either 1, 2 or 3 depending on how many digits play from that level. If 1 digit plays and doubles, I mark "1" and circle it.
Then I mark anyother "level" that had a digit on it that played.
Zeros go on levels in between those that play and if no digit on a level I mark the level with an "x". Each day I mark the chart, write the 3 new digits on the 1st Level and move all other digits down a level. Reason for using pencil instead of pen as I move my writing acrossing the ledger left to right.
It's all really very plain and simple in nature and uncluttered.