Hi Wilco,
It’s Wilso :lol
I have used the same Rhyno box from bunnings . Seems to be dust and water proof in the back of my Landruiser Ute as well!
I haven’t used it for my Astro gear only camping stuff but seems to do the job OK. Just depends on how expensive the gear your transporting I suppose. I would only take a cheaper refractor away with me if you plan to do some ruff terrain though.
Cheers