Aeronaut wrote: I suspect Lee is finding what he expects to find, and testing other theory (not to mention fuels) could possibly disprove this remake of the ‘sound barrier’.

It seems Lee`s measurements were confirmed by all kinds of DPF so far, so I cannot see a reason why it should be different. As for fuels, I agree with you. Boron was not tested yet and I think the compression rates for Boron follows closely Lerner`s theory since there is suppression of the Bremsstrahlung since the relative beginning of the plasmoid compression.