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Author Message   Bossman Tinkerer Username: Bossman Post Number: 127 Registered: 02-2009 Rating: N/A Votes: 0 Posted on Friday, May 27, 2011 - 08:41 am:    I have found that DAP Weldwood contact cement is as good as anything I have used over the last 40 years (and can be found at Home Depot or Ace Hdwe. etc.)! Clean off the old cement (careful of any solvent)..........naptha or lighter fluid, will not ruin a focusing screen or any other plastics; then lightly coat BOTH surfaces and allow to dry couple minutes and press together...............DONE!!