A few friends have asked me how i set up for hamstring raises without a proper bench. Without one they really mess up your knees so all you may have to do is buy some chain and clip and you'll be away 
First i take the leg pad thingys off the roman chair
Then i place a chain over the leg support thingy on the lat pulldown machine
Put the chain around the lat mach leg brace and through the roman chain leg thingy
Set position, knees behind roman chair pad, i also brace me toes against the machine.
Then dive on out
Knees are protected by the quads rolling up onto the pad.
These have been the best thing ever for my hammies, hope this helps someone or maybe gives you an idea of a variation you can do yourself

First i take the leg pad thingys off the roman chair
Then i place a chain over the leg support thingy on the lat pulldown machine
Put the chain around the lat mach leg brace and through the roman chain leg thingy

Set position, knees behind roman chair pad, i also brace me toes against the machine.
Then dive on out

These have been the best thing ever for my hammies, hope this helps someone or maybe gives you an idea of a variation you can do yourself
