Senior Moderator, Moderator: Community Buzz and Ambassador: Miles & More (Lufthansa, Austrian, Swiss, and other partners)
Join Date: Jun 2005
Location: 150km from MAN
Programs: LH SEN** HH Diamond
Posts: 29,517
Welcome to the M&M forum, eightblack!
The FCT is a departure terminal and in order to use the FCT you will have to depart from FRA by plane - and not in a fast car! It may work on your way back to SIN but not when you arrive unless you have a connecting flight. You can use one of the First Class Lounges in FRA is you arrive on LH in F.
I cannot answer your question about your chances of an upgrade but you will have to ask the 1K desk to send you paper SWU in advance. I don't think UA's SIN office can do it for you.