Lots of elbow work . Line sanding and trueing from Station 234 bulk head to station 123.
Initially i tried using a long T bar with self adhesive 80 grit on it - this worked but there is a twist or change of radius from the 152 bulkhead to the almost round 234 bulkhead. What happened was that at the 234 bulkhead the T bar had minimal contact or was on edge . The top of the fuse from 123 past or midway to the 234 bulkhead is pretty flat prior to the upper stringer - so this area had a different profile on the stringer - then as it goes further back toward 234 it is a constant radius. I decided the best way to true this was to string line each stringer - line sand off the spline to hold the "flat" and roll the edges for the radius .
