but if you on a budget then the car seat ones do work and mondeo ones are probably the easiest to come by

the seat actuator in my bot can lift 20 + kg and it is fitted just over half down the arm from the pivot so if it was right attached right at the front it might be able to lift nearer 40kg

http://www.ebay.co.uk/itm/FORD-MONDEO-M ... 500wt_1167