Hi mv3i.. those schematics were drawn by me actually.. glad to know someone kept it...
And YES.. this method is dangerous.. I repeat.. this method is dangerous... I did not seal some of the wires very carefully.. (still a bit newbie at electronics) and I used some lousier parts than cookie's..
Again, cookie DID NOT follow my schematics nor did he copy, he was doing his concurrently when I was doing mine... in fact we did discuss some parts about it and he did raise safety concerns which I totally agree on... but since I made this for myself, the only one I can kill is me should something go wrong (touch wood)... but cookie has his for sale and it would make sense to ensure that it not only works but is relatively safe for the reefer..
As for me, even when I was working on the project I got electric shocked not once but TWICE due to carelessness... while my young heart can still take the jolt, I rather not take the chance again...
So like I said before, it's either you get your hands dirty and DIY, or spend a few more dollars, save the trouble, probably reduce the risks at the same time and get the Tubby instead...