Was just looking through the threads and saw this one pop back up
I've had zero issues with the pilot flex tube setup I installed over a year ago...I just took a few pics to show how it's holding up. After applying the shrink tubing to the flex tube there are no issue with adhesion. Everything is tight and in place as I first installed it.
The Pilot tubes are all the same size....but...
this store sells different sizes http://www.thefiberopticstore.com/pu.../SGS-Fiber.htm
, I've tried the 3 and 2mm. the Pilot is about 2.5mm. the 2mm didn't seem to carry the light as well and the 3 was too fat. The 2mm might be worth a shot if figure out a way to connected the led's differently than I did.