T
Time's Ran Out
Unless it's changed tj bal used to say this was OK for chipboard although I must say I wouldn't do it .
I think that's what was established in the thread then @Boxtiling seems to be going the direct flexible adhesive route!
When I've read the technical info on manufacturers packaging they've always left the decision to the installer by providing the relevant Bs 5385 code of practice. Usually a get out of jail card when the floor cracks through deflection!