No adaptor problems at all, I although used the adaptor from the sandwich plate that was there, so not sure if any of the 4 adaptors that was sent with the plate where the same as the one there, had a nice tight seal between engine block and adaptor and then to the sandwich plate for the oil cooler to the filter. it did need some cleaning up though, with the teflon tape it's not leaking anyway and feels solid once there. I'm probably going to redo the whole thing there once I get my head around how to get the feed and return pipe for the oil cooler not to hit the redistribution for the oil to the turbos and the pressure sensor.
Ah ok, if you used the original adaptor that would explain why you had no problems fitting. I will e-mail them and let them know so they can alter it (whether or not they do is a different matter).
Mine seems fine now its fitted, i.e no leaks but I will be keeping a close eye on it for a while.
Just a note, I fitted the supplied 1/8th blanks to the unused ports (with PTFE tape) while it was off the car and done them reasonably tight. I checked them again once fitted and with the engine warm. Due to heat expansion they had become quite loose and needed a further half a turn or so tighten them (but not too tight). So might be worth a check of your when warm, although looking at your pictures, you seem to have them well in there!