[Linked Image from thumbs2.imgbox.com]

[Linked Image from thumbs2.imgbox.com]

Well, after a cleaning, odd striations are apparent remnants in the 24 X 24 tubeset?

Someone didn't clean w/ a stainless brush & make these???

In Grad School in Optical Engineering I worked on a few PDL & PAL lenses that inspected the fuel lines of the Shuttle, whilst racing Concrete Canoes. One of my professors(Civil & Mechanical) designed & developed the lenses. Would be nice to have one now.....



Hochachtungsvoll,

Raimey
rse