i have got a escort 55 and it is ok, i run a 400 litre system, (only ever fill it to 300, i bought it cheap) the only thing i had to replace was the shock on the back but they where a £10 each on ebay new so no big problem u might have to do this, as chance are they wouldnt of been replaced, i will take a pic and show u what the back of mine looks like, not the worlds biggest van, but i get tank, battery, reel and pole in, plus buckets and trad gear, i dont carry ladders
if you can get the 75, as this holds more