Can I change test esters during a cycle?

[Big]

Hey Bro's, I've been on a test e cycle and eq for 9 weeks, starting first 4 weeks of test e at 400 and then to 600 with min gains. This is my first time on test e and I'm not enjoying these sissy gains. My diet is fine, and all other stuff is fine, as I've been using for about 4 years with great results from other esters. My batch is good b/c it was shared with others that got good gains. I have great gains when i take sust.

My question: Can I switch to sust at this point without any major drawbacks? I want to run another 8 weeks using sust. Also, would you run hMG (i.e., hCG for those that don't know hMG) at some point to bring the boys back up for round 2?

Thanks

the gains off sust and test e would be practically identical, besides the esters test is test.