The 16" wheels work a lot better than the 10's did and allow easier movement. I had a chance to test out the pinholes I got from Earl and appears they work well. Thanks Earl!
Still having an issue with the film holder leaking slightly on one side.The strips of wood that contain the dark slides were made from one piece of pine and split to fit on the opposing sides of the holder and one seems to have a bow while the other doesn't(go figure). I've tried adding a piece of felt to drag on the dark slides which helped somewhat but as yet no cigar. May give up and replace them but was hoping to work out an easier solution(haven't as yet!).
More to come.