40kg block of soap (shraded already)
Okay. by "shraded" I think you mean "shreded", yes?
According to this thread,
https://www.soapmakingforum.com/threads/quantity-of-water-per-kg-of-lye.88914/...you guessed at the amount of water needed for the CP soap you made. Correct?
If you ended up with a 40kg block of soap, then
40kg divided by a factor of 1.37 = 29.2kg FAs (Fatty Acids) aka oils, fats, butters (approximately) in your recipe.
Advice: Use
SoapCalc to determine the correct amount of water and lye needed for the FAs you used. Once that is determined, the difference between the water needed and the water you actually used needs to be added to the shreds if you didn't use enough water.
If you used too much water, then no additional water is needed for the rebatch.
I am not familiar with the type of equipment you have to re-process your soap but I recommend trying a small, 500g batch first before rebatching the whole 40kg of shreds.
This is fascinating! Please keep us informed of your results.
HAPPY SOAPING!