I am not very experienced; but if there is a way to foul up I usually find it pretty quick. I was using two of Jason's clamps on a small mold, clamping the one closer to the hinge first then the other. Tried to keep the clamp pads about in the "verticle middle" of the mold. Then not much downward pressure on the injector. Worked great. Getting this down pat.
Being the not to swift person I am; I thought "two clamps seam overkill, why not just put one dead center". Well, I guess CC plastic is about like water and doesn't compress very much. On the next injection plastic politely sprang forth from several areas of the mold. Physics works don't it. Went back to the original way and all is working as it should.
One other free tidbit; if you push down on the injector body too hard and put too much pressure on the plunger; hot plastic will squirt out between the injector and mold with pretty good velocity. Physics works don't it, Chapter two. Was not injured, just a DUH moment.
Reminded me to always wear heat resistant gloves and eye protection.