Roger ' thanks for the encouragement !
I'll keep playing around with cheaper pairs & stop fiddling with a Montgomery Ward 7x35 609ft at 1000yds for now & good other models
My favorite binocular so far is a Swift sports king ` built like a tank 7x35 - 630ft at 1000yds , these arrived in perfect condition with case & original box .
Thanks for the tip about making a rhomboidal prism out of two Porro prisms ' got some of those .
Cheers & Beers
Bobby