might pay ya to use a softer strut it that one is tight. you'll end up twisting your bonnet or something. it only needs to just hold the bonnet up not force it up.
could you tell me the pressure of the strut you are using. i have quite a few varying pressure struts laying arround from a job i did and might look at throwing one om my troll
its not forcing the bonnet.
when you install the strut you do it at maximum strut extension - so its not forcing the bonnet out of normal arc. ie support bonnet via normal support bar, measure up the strut and secure. any bonnet droop will be the same as if it was held up on one side by the support bar
once the bonnet is down the strut is unable to misalign the bonnet as its in the normal triangle lock down, ie L, R, Clip. it won't push it out of alignment as it can't.
the reason for the hiace was its designed to carry a heavy gate, so its not going to fade as fast as a normal bonnet strut (eg off a falcon)
if you wanted to be technical I guess you'd look at struts that carry similar weight. eg I imagine a magna wagon 5th door is probably slightly heavier than the troll bonnet, so a pair of those struts might do.
the other issue was that the other struts I looked at required ball socket joints to be mounted as strut receivers, the hiace was already fitted with frame hinges, so it was not going to be difficult to fit and place as long as there was enough realestate on the firewall, and as long as the other hinges could mount on the bonnet subframe.