Deca takes a long time to build up and even longer to leave your system. You don't want to run it any shorter than 8 wks. Thats the absolute minimum. You wont even feel much for the first 5 wks. I have a much better suggestion for your plans. NPP, Fast acting deca. This version of Nandrolone will start to work within a short time and your cycle will be cranking much sooner. So test with NPP around 300mg EW for 6-8 wks. Then your cut stack for 6-8 wks and you’re golden!