This is a great idea, to make some good checklists for EHM planes.!!!
I think the checklists should cover especially the airplanes that are in the Euroharmony fleet but cannot be easily found elsewhere like Sukhoi 80, Tupolev 204, Piper Seneca, Piper Arrow, etc.. and, first of all, they have to be related to the panels that are available for download on Euroharmony website and should contain the reference speeds for that aircraft (rotate, approach, etc. ) and the rate of climb and the rate of descent, the flaps extension speeds, the landing gear extension speed, etc. This kind of checklists will be very helpful and all pilots will appreciate them. The format or the type of document is not so important, the information contained is the thing that really matters.
I say again, you're doing a great job with these checklists!! Good luck!!