I have a Besalar 45 negative holder called the Negaflat for my Besalar 45M, it a pplies tension to the negative and keeps it very flat, does any one know if they make this for 8X10. Or any other suggestion that might be usefull, I'm conside ring building a 8X10 enlarger from an old Elwood 5X7. Also if you're using the kit to convert the 45 to 810 I'd like to know what you like of it. Dave