I bought a roll of the smaller 25mm internal diameter air-seeder hose mentioned in these threads. First arch testing now. Not sure how they will hold up, may be better with the larger size. Pixels inside is 2.5 m 2811 strip. The "hotspots" show through, even though the back of the strip is resting against the inside arc. Still, I think it looks ok. One down, four to go ...
http://phoenixreborncoduo.com/files/DSCN0731.MOV
http://phoenixreborncoduo.com/files/DSCN0731.MOV