After underextruding, we now enter the era of bleeding and overextruding!

I am an owner of a Ratrig 3.1 400. About 6 months ago I had a failure (no pic) with my Rapido hotend. So I thought time for an upgrade with the toolhead v1.0. Bought a new Rapido 2 too. (Bought 2 but that was my mistake. Anyway) tried to set it up but no luck. Massive underextrusion. MASSIVE. Just could not make it work. After a test print I came to the shop to find this. (Pic1) Replaced the whole thing and had another exactly same failure. I cleaned the first blob and put every thing together with new cables on the thermostat and ceramic heater. Ever since the change I have an extreme overextruding problem and the nozzle cannot keep preasure in the throat. (Pics 2&3) It drips if I try to heat it up. Oh and retraction does nothing at all. Also (and this is really weird) the temperature on the nozzle rises really slow... I calibrated every thing but to no avail. Any thoughts?