The question was asked a while back as to what condition the main sill section was in that I'd cut off instead of just repairing the bottom rotten section.
As can be seen it was still like new, so why cut it out?
We'll, it's now got new metal that I know is good all within the sill cavity and the weld joins are out of sight, aside from the rear quarter joint of course. Should all last for many years to come once painted, sealed and protected.
Next visit I'll make a repair for the bottom of the wing and the rear inner arch to cap in for the sill then onto the other side.
These sills are very good, nice fit and well made.