This will work well and is an good idea. Have something short acting to switch to after the three weeks. If this is done after an off period you will blow up like crazy. What type of test are you talking. If it is a long acting one it will be in your system long after the last shot. Good idea just have something short acting to use after it to taper down. This is really how a lot of bodybuilders are doing shit now, start on a very high dose and work down. This seems to work better then going up and down.