Sorry, I missed the adex usage. good. Anyway the crap idea is the hcg. It will just make your recovery a lot longer, as you have been exposing your leydig receptors to a high dose of synthetic lh for the entire length of your cycle. Your body slowly secretes lh at night during your sleep. It doesn't hit your leydig receptors all at once - 300 ius every weekend like you have been doing.
as for your pct this is how I would do it:
I recomend .5 mg of arimidex daily throughout the 500mg of test per week cycle. At the end of the cycle, it will take roughly 4 weeks for levels of exogenous testosterone to fall off. During this time, continue to do .5mg of arimidex daily for two weeks, then reduce the dose to .5mg of arimidex every other day for 1 week, and then .25mg of arimidex eod for 1 week.
As testosterone enanthate tapers itself, and the body can't distinguish exogenous test from endogenous, there shouldn't be any need for using hrt test during this period.
At the end of this 4 week period continue with the arimidex at .25mg eod for 2 additional weeks, to ensure estrogen aromatization continues to remain low, and that there is no 'rebound' effect when you go off the arimidex, as can happen if you stop it too soon.
That is all that should be needed for a straight testosterone cycle - the key as I said is keeping estrogen in check from the get-go! nolvadex and clomid will not suffice for this! you absolutely have to use an AI!!!!
Now, at this point if you wanted to try a SERM that would be the point to begin it's use.