Yes, sad news indeed. around a month or two ago I started collecting scans of this Monogram diorama tips sheets to post in an album on Facebook to share with others, I have quite a few of them but am still missing several. Just wish he was still doing the Diorama tips sheets when Monogram got around to upgrading and rereleasing the Aurora Camel, SE5a and D.VII in the late 1970's as I'm sure he would have done some great scenes using these kits.
Dave C