Come on guys, what y'all thinking!
Cut out a section on the 200mm run and replace it with a new piece of pipe, soldered on with TWO slip connectors.
So say you cut out 60mm of the old pipe, get a 60mm length of new pipe, clean/flux it and slip on a slip-connector onto either end. Put the new piece of pipe into place and slide each slip connector outwards by half their length.
Assuming all is clean and fluxed, apply heat and solder.
Stand back and admire job.
Once drained down this whole process should take less than 5 minutes.
This will only work if the pipe can be drained and kept dry during soldering.


Above are two types of soldering slip connectors, top one is endfeed, bottom one pre-soldered.
Slip connectors don't have a central 'stop' so can be completely slid over the pipe and off the other end (if you want!)