Yes, of course you can but I think you could be complicating things alittle bit, just try a shorter ester and log the results, see how you feel and respond. When you get more experience of many compounds and esters, you will be in more tune with your own body and know which you prefer but at your stage I wouldnt worry to much about it, just make sure you inject at right times for the blood levels to be most stable IMHO.