if you are running sust at 500 mg a week you should break that up to at least 2 x a week. For example, 250 mg on tuesday and another 250 mg on friday. You have to do this to have stable blood levels of testosterone. Also, if you are not doing so already you should take an anti-e like arimidex or liquidex EOD. .5 ml of liquidex EOD throughout your entire cycle would be plenty. E-mail me if you have any further questions...