Hello.
I'm struggling to get hold of NDT well at least at the price I've paid before. The places I've found recently want more than double what I paid before, can't really afford it atm.
I'd rather stay on NDT so I will be trying to get some before my current tub runs out.
I have T4 and T3 so I was wondering if anyone could tell me how much of these I would need to take to match 5=1/2 grains of NDT?