You can find answers to every possible question you might have by running them through the "search" function here. Every nut & bolt has been analyzed and commented on. The only one you might not find an answer to is #5. I can tell you that I too am 6'00 and weigh 220 (got good knees though) and have no issues with comfort. There is an retractable insert that extends out from the Ricaro seat that would give your knee some additional support.

I'm considering parting with my '99 Astral (88k) at a $9000 firm price. Not real anxious but might sell it to the right buyer.