This is the tricky part -- That's why I said "take your time".
HAVE PATIENCE --
This is where I had to go back and use the file -- take just a little more off.
*- You need to insert the rubber tube from the backside first.
*- Work the lens in from a slight angle -- holding the tube on the otherside.
*- If you lightly damp the lens and the inside edge of the tube -- it works easier.
Like I said before -- be patient... take your time... and you will appreciate the outcome even more.
Any specific questions -- post them or feel free to PM me
Judging from his newest post, he did not have enough PATIENCE. :blink: