I had the same grinder and I found even with shims it simply will not grind fine enough.
Personally I would look into another grinder (others may disagree) but there are grinders popping up here in Perth all the time. I doubt that much of an issue would be caused by tamping alone (36 g in 16 sec is very quick!).
Some of the fines might get fine enough, but the consistency simply won't be there.
I would recommend getting to the point where you 'choke' the machine - ie coffee simply won't come out because it is too fine. Once you get to this point you will know for certain you are finer than you need to go, before then it can be tough. Then dial back from the point where you choke the machine until you get about the 30ml in 30 sec mark and fine tune from there