I read the Ram PDF file to which you provided a link. A few thoughts:
- Your synopsis of warnings seems a bit out of context (after reading the Ram literature).
- I suspect that the Ram literature for their single plate clutches has a lot of the same boilerplate verbiage (providing suggestions for "maximizing the life of your clutch").
I am sure the McLeod single plate clutch will work fine for you. However, your "assessment" of and generalizations about twin disc clutches is probably going to rattle some chains on this site.