I consider Rog's spring assists as a complementary item to the leaf springs, improving their characteristic on the end of compression.
I see parallels to the original Mini rubber suspension, actual Citroen passive hydraulic cushions or all the accessories with similar function, available on the market.
Many cars I possessed had similar rubber bump stops as a standard equipment by factory (despite of the shock absorber integrated solutions).
The argument of shortening the axle suspension travel might be more critical with Morgan than with other cars. However, slightly shorter suspension travel with "soft end" is probably the better alternative than a longer one with a "hard hit end".
Another question is, do Rog's spring assists really significantly shorten the suspension travel?
On my original contraptions I did used the original old BMC mini bump stops and they worked well. The weight of a mini is not that dissimilar to a Morgan. Contraptions MK2’s use better performing elastomer. I also took the opportunity to squeeze in something bigger with an increased working range. Both version stiffen the spring rate towards the limit of the movement but the later version are even more progressive.
“Do they significant shorten the suspension travel?” I would guess it depends on how precisely you choose to adjust/tune them to the specific car and control the vertical movement. But is this a good or a bad thing? We would need an expert to answer that but for me if they enable the use of softer rate (more comfortable) springs on my car without the fear of body contact then it’s a good thing

However I don’t know how shortening or controlling the vertical movement might affect cornering….

![[Linked Image]](https://dl.dropboxusercontent.com/s/qu49ypi1xd38lmk/bmc-stop.jpg)