A couple of years back my knees were becoming ever stiffer affecting access and egress from my +8, fortunately less so today. For those with such problems it seems a Morgan owner has created an instructional vid to assist overcoming any such issues...
https://youtu.be/u63s2scN03gAn interesting video.. I had to try his way.
The Aero Chassis Plus 8 is too wide to hold the passenger seat, so I used the driver's seat. Otherwise it works well!