Hmmm...reading your post seems like a nightmare...sorry the hear that man.
I have never bought an opus. I heard hes a very busy guy...and things do go wrong but I just cant get the fact that its taking him to long to resolve the problem...its actually long enough to give him a bad image. If he did take his time to send you the correct product with the correct parts things wont get so complicated at the first place. Ill say the worst thing is not knowing where you stand...no emails within 2 days makes me nervious, prompt reply and reliabilty is good
I guess you just got so unlucky...who knows.
Look like theres a good market for this type of PSU...maybe I should look into it.