Reporting back...just returned from visiting my dealer for the second time in regard to this issue. As I had stated earlier, the propane line was initially routed away from the rail and axle U-bolt, as per FR directions. However, the line then became crushed by the axle itself when it came under compression and pinned the gas line right to the TT's underbelly. After examining the situation, my dealer's tech (@ Lazy Days, Tampa) and I decided that the only way to effectively deal with the problem would be to re-route the line over the axle and then into and through the underbelly and then out again on the other side. This is what we did, (after sending pics to FR rep. Susan Thornberg and receiving the official "OK"). Gave it a visual inspection after returning home, and everything looks good. Hope this fix will truly remain a fix!
Good luck to all of you out there who continue to be frustrated by this issue. Ms. Thornberg told me that some 600+ trailers might be affected by the original LP line safety recall