HCG not taken all the time

I am in the middle of a cycle, 12 weeks of test e 500mg every week. Once, I finish this cycle, I will cruise for 4 weeks, then hop onto my next cycle to prepare for my BB contest in late May. After that, I plan on coming off for some months. Do I have to use HCG all through these months, or I can just use it about 2 months before I decide to come off, to get the testes back to their normal level? I will come off by having 100mg of test in me for 6 weeks, then nothing for about 10 days, then a shot of pharm grade triptorelin and normal 6 week nolva/clomid PCT.