Thanks Dirk...the 4U thing even more next year seems to be giving me the red a** with the LHR/CDG to TXL routes and now this. I think I ended up finding something that works with SK to get to KEF and do a little stop on the way back in CPH.
Right now the only thing I have on 4U is EWR-LHR-TX which was booked with UA in J. Not worried about baggage allowances since UA is my first carrier, only 2 hours at LHR (if everything is on time) so will see how it works with the UC since the 4U one is listed as "Business" on UA (even issued my seat already in row 1)...if that fails and I have at least an hour I have a one time club pass to burn.