the trakker big z is actually a bivvy not a brolly.the leaky door is on the armadillo bivvy,and can be cured by adding the optional winter skin.the aqua brolly,is just an oval brolly with built-in sides,main difference between aqua brolly and nash profile,is that two of the aquas ribs are extended,so there are actually 4 ribs touching the ground.this makes it more stable.also,were the profiles cover is just stapled to the ribs,the aquas are rivoted!...well stronger!.the aquas stitching doesn't come undone either,and it doesn't leak,down the centre-pole or anywere else!.
regards mark