putting any engine on a dyno puts that engine at risk.
many factors, temp, tuner, fuel quality / quantity, condition of engine, etc
by the sounds of this thread you went there twice with the issue, 1st time having things fixed / replaced (finding metal shaving then?)
then again to tune after fixing the broken parts. took time, and tuner said there were still issues (ie death rattle sounds)
and you're questioning what went on.
is that the jist of it?
from all that URAS has posted over the years, Id trust his work.
Just one of those things - that we all hope never happen to us, but hear of time and again
however Id say trent may regret not being in a little more contact with you in regards to the issues at the time, and whether he should have continued tuning or not.
commuication is the key here, however it is (slightly) understandable as workshops are busy busy busy and customer relations can be at the back of the workshops mind.
perhaps go back eye2eye, sit down over a lunch break and discuss ALL of what went on, with Trent and whoever else worked on the engine.
but as it is, the workshop insurance wont cover you for your losses, as the risk is entirely yours when/if you go on a dyno
harsh and sad but truth. its OUR risk as owners to modify / tune cars above and beyond factory specifications.
I feel for you, and recommend you go BACK to trent for the rebuild, as Im sure he would look after you 100% in terms of pricing, quality of workmanship etc
best of luck with it.
my stagea is being tuned atm, headwork etc, and what you're going thru is my worst nightmare !~