I think it is best to use coated glass under the neg and anti-newton glass over the neg. If you step back and think about it for a second, why wouldn't you want nearly 100% transmission instead of 90ish? The refracted light has to go somewhere....

I have done this with a 35mm enlarger and the results were perceptively (albeit slightly) better. I keep meaning to order AR glass from Edmunds to put in my Saunders 4x5 carrier that I use for all formats. I'll just need to find someone who can cut it, if anyone has any suggestions.....

I would love to replace the bottom glass with Schott coated glass. That would be the shiznit...