GEnxsux,
the most common repair on our fleet, on the RR side of the house, is the 'overtie' repair - see ATA 70. Very useful. As for splice repairs - if you have to make the wire bigger by splicing and protecting with a sleeve, you can often a) spend more time and effort than an overtie and b) potentially cause clearance issues with the 'thicker' repair area.
As for the CFM vs RR harness issue - it's $30k plus for the RR harness and only about $8k for the CFM......
Regards,
N1 Vibes