not heard of it myself and very interesting videos - either way, i wouldbe trying trile tube - or at least the method of core sampling they already used with success - this expensive method is irrelevant given there is nothing wrong with the core samples to date - as we know it is the RC which probably represent 80% of the hole drilled - one is neither going to do triple tube or sonic drilling to replace all the RC holes - maybe design a program with the resurce consultant  say 20more twin diamond holes to the RC holes to allow inclusion - upgrade into indicated resource - however as i said now it is spilt milk BUT for any future drilling campaign inot these old channels they must fix the problem - exploration is probably okay, but infill resource drilling needs re assessment.