Did you pass 486 already? I just passed 141 (xml) this week. That is really hard. Hopefully, 486 is not as hard as 141 or harder.
You mentioned that "whizlabs also do a test simulator which you may find helpful (at about 40 USD)." but I just checked with whizlabs website, there is not such a simulator, even though they implied they will publish 486 simulator in their emails.
Could you give me some hints?