I also use HC-110 at 1+49 which works superbly with the metric system. For my SS tank which holds 250 ml I use 5 ml of concentrate. As a plus I also use Rodinal at the same dilution. Makes life a lot simpler.
I use a 10 ml measuring cylinder and the viscosity of the concentrate doesn't bother me. As far as baby medicine syringes are concerned they are not very accurate and should be checked.