Dmitri
You definitely cannot be accused of refusing to help people out (I'm not just talking about this case here); quite the contrary, and I suppose it's normal to get annoyed after being so patient. I think what's happened here is that this person got the impression this was some kind of store or something (Dmitri working for Synthex! that was funny...) where you pay for a product and you have full right to expect (demand) it to work. To a degree that's correct, but only concerning the separate parts themselves. I think it should be made very clear that whoever buys a kit is just buying
parts, not a working megadrum. When you buy a brand new hi-fi system you have the right to demand that it work properly, but this is a different story. There isn't a manufacturer selling a finished product -
you are the manufacturer and it depends on
you to make it work. You can ask for help, but you can't blame others if it won't work.
It says somewhere that basic soldering skills are enough, but that's only if you're lucky and get it right first time - I'd say that reading schematics, using a multimeter and identifying components are also essential. I agree that anyone with soldering skills can probably do this, but I think that alone really isn't enough.
I know, this has all been said before... but some things can never be repeated enough times...

No Dmitri, I don't think you've done anything wrong, i think it's just a few too many things were overlooked by this person.