Dragstay & Phoinix - you may wish to contact EC(UK), as they have a mod which mounts 5.6kgs onto the handling bracket on the rear of the fenestron. It was fitted to most of the early UK Police machines to correct the forward C of G of the "pod" system - I believe it's also fitted to a few of the newer machines too.
WLM - you may like to also consider a MIBS (Multi Integrated Bodysplint Stretcher), as this rolls up and is very lightweight. The strength to carry a patient is derived from rolling it (the other way) round the patient. This link should give you some idea - there are a number of variants, depending on use:
Medical Stretcher
RVDT - just to question your comment about
you can fly the full flight envelope without the other good engine exceeding OEI limits
- if you meant that you could pull power on the good engine above the AEO limits, I think you'll find that you should not use the OEI range unless actually OEI. To do so would be regarded as an over-torque by your maintenance organisation. For example, Note 2 of the FADEC FAIL caution clearly states "Do not exceed N1/Tq value of normal engine and aaeo limits"