Don't worry about having your posts moderated - every new user gets that for the first few posts until it's clear that they're a human being only posting about aviation, then the moderators stop worrying and leave you alone.
As your fix isn't defined by a beacon (over here we'd usually use an NDB for a fix like that, which is easy - when the needle points at your right wingtip, you're abeam!), in my opinion your primary knowledge comes from accurate flying and timing. BUT, the DRK VOR/DME could be used on your no.2 box to give you a cross check.
Probably! I'm a pretty average instrument pilot myself, so possibly somebody else will have a better answer. I just enjoy looking at the problems.