I am in the process of getting one of their lenses and testing (comparison) it myself, I own TM2000 (used them for 12 years) and Cobra cobalt,if it works well I will be adding it to my inventory for sale.
Our Cobra Cobalt lenses while plastic do remove the sodium flare well they however scratch and are darker than the TM lens which shatters very easily, Ask me how I know
, I have broke 3 2X4 and 1 4-1/2 X 5 ,Ouch!