K1 Max Print Speed changed after updating firmware

Hello, Im in the middle of producing a life size Pieta for our Parish Church. It is a replacment for one we had previously for those who had died in WW I and II.

This is my problem. I updated the software to the latest version with all of the relevant 0.4 nozzle presets but since doing this a cube of the model (and we have about 85 cubes) used to take approximately 15 hours to print but not usually any longer. After updating the settings I find tha each cube now will take approximately 36- 54 hours to print. What’s gone wrong?

Im using the same generic petg and have had no problems printing with it at speeds of 125%. Please could someone tell me what would be the best settings to print to go back to the 15 hours or so rather than 36-54 hours.

Any helpis most appreciated.

Sorted the problem. Uninstalled version 6.x and installed version 5.x. The same file went from 2 days 8 hours and 34mins to 20 hours and 18mins.