Yep, that's the list. Mechanical seals are not yet a reliable engineered product, unless you pay a $gazillion for them, which I doubt happened (there are cheap ones available too). Remember that original Amy deposit free-flowing sand in the original Gunson work? If that is what the dozer traps are designed to accommodate, that is what you need to feed them, or the "range of..." Shaws report is what happens.
Truck and shovel couldn't do the tonnage efficiently, but it is a stop-gap option for them; dunno what the numbers on that look like on a low head grade deposit, but unlikely to be particularly appealing.
The problem I have, and many here know this, is it was an accident of COVID fate that I couldn't engage properly with the Coburn implementation team, having got our own dozer trap design from DFS preferred ("daylight to second place") to "we need to do what we just did at Cataby" because the State was closed to non-WA, regardless of vac status etc. That some did label views I held as some version of disgruntled commentator, totally untrue as anyone that knows me knows, is why I am reluctant to engage much now. Despite the concerns expressed subsequently being validated, I take no joy from the misfortunes of others. Ever.
The team I lead has just released our latest version dozer trap and it will get traction in the industry, maybe with STA, but more likely elsewhere as STA are on a path now, and driven by different imperatives; this is how it goes sometimes, and that's OK. Check it out here, if you are curious:
www.iput.au/dozer (can't get the link to work, try copy paste!)
(20min delay)