Is there a reason why Rover ou BL didn't use these rubber stops on the dry setup ???
If they are so much better then surely they would have used them, do they allow the arms / cones etc to rise up too far ??
I can only guess here that it was as a result of different committees that the frame vs arm mounted stops came about. From my own checks here, when either style of stop is fitted, the arms have the same amount of movement and in any case, both sets ups have been designed such that it won't cause further issues - with stock suspension arms - if the stops (Compression and rebound) are not fitted (eg, the rubber breaks off all together) other than an awful bang when at the extremes of travel.
If I need to cut down the C-AJJ4007 bump stops to maintain current ride height, will that compromise compression/rebound characteristics? My thought is probably not anything that I would notice.