Hi Nihl,
Wow, already so much detail!
I'll catch up soon but just wanted to answer your questions on the dimentions.
The smaller one, with tiger head, is 27 inches double edged and is definiely flexible/springy as I believe pattas should be. The fist bar is about 3.75 inches in width.
The larger one, as a 39 inch blade and it pretty stiff, firmly rivetted to the hilt much like a firangi. Hardly any movement of the blade. The fist bar is just short of 3.5 inches, say by 2mm.
Very grateful for your response!