Hi Lorne, great to see that you have withdrawn your condemnation of Roger's "thingies"! You can maybe see why some of us were surprised you could be so judgemental without experiencing how brilliant they are.
Nick
Not to worry Nick. I am still judgmental.
Essentially, these thingies are not bump stops (though they can fill that function) They are a substitute or supplementary rubber suspension. It was deemed needed, ultimately, because so many leaf springs Morgan installed were/are defective. They are an effort to compensate for a very basic, very bad component supplied to many of the cars after some date in the mid-2000s. Another expression of that the frequent failure of that component seems to be the flirtation with 5 link rear suspensions. I could not figure why anyone why trade a delicious and rare rear comportment (assuming all is as it should be) based on many centuries of usage and theory, for anything.
If something ain't broken, don't fix it! So it must be that something was broken, at a very fundamental level to have occasioned ingenuity like Roger's. It is based on the curse "ALL MORGAN DO THAT!" when in fact, the best policy is to assume only one's own does. Roger's and 5L suspensions implicitly assume that the ALL Morgan leaf springs are kaka and Morgans, as they should be, are wanting in this area. Just think of what that says about tens of thousands of owners from 1936 to 2004!!
Actually, I think it really says more about owners of Morgans made after. 
When I ran into the failing leaf spring problem with a few MMC-supplied 4&5 leaf sets for my UK Morgan, I found away to get a set that lasted outside the MMC network. It never occurred to me to re-invent Morgan rear suspensions.
The current treatment of Morgan front ends is analogous. True, Morgan began using a too long rebound spring many years ago causing front end steering to be ..er..excessively stiff
but this was vastly compounded by the current lack of regular (simple) maintenance of the area ,[/i] (has the average stomach become too big to maintain a Morgan front end?!!!).
Perhaps there is a current new fetish about making one Morgan more complex that I am missing. After 250,000 miles of mogging with only myself and my wife to care for us and the car, I can tell you that the greatest thing is Morgan adventuring and that is impossible to do in a non-simple car you can't fix roadside. Morgan simplicity and performance and ride were its stellar virtues,
though yes, they are also very pretty..I recently sold my 2014 4/4 as I had become increasingly unhappy with aspects of the modern cars. I ended up buying a 1987 plus 4 and have realized how different the old cars are. The road-holding and behavior is so much better on the 1987 car. I'm really addressing your comments about post 2004 cars.
I am far happier you saying that than I. Sad, isn't it? I am ideally positioned to appreciate what you are talking about. The MMC re-created my 1984 in 2002/3 using parts and ideas (some never used in other cars) from the entire history of Plus 8s. (The UK dealer network kicked in new old parts from old inventory to help with the project). So I had a bird's eye view of what happened to Plus 8s over a 36 year period. The best I can say is that Morgans are like wine..with good years and eras and ...er.... less good ones. The quality, ride, etc does not follow a linear path upwards over time. Also, after 2004 they change so often that they become progressively harder impossible to track, car to car. I abandoned that attempt for the GoMoG Manual a decade ago. We can discuss the whys of this 'til the cows come home. It is interesting.
However, every Morgan trad (bless'em) can be sorted to a great extent with a screw driver and some common sense. The first and most important thing is examining what is NOT working for you and finding out why. Obviously, over a 100+ years, it worked for someone with a Morgan..so why not yours now?
I exclude new stuff like PCBs that fail while on a holiday. Nothing to be done. Good to know you Nick. Thinking out of the box is so rare these days. One must believe the evidence of their senses, divorced from current advertising and community templates. You do that. Very refreshing.
Lorne
