Hi Malcolm
Just some thoughts. A decent, commercial parallelogram mount to handle “giant” binoculars will probably cost you at least between $700 and $1000 alone!
I built a
parallelogram mount for my Vixen 30x125 bino’s and found it almost as time consuming to set up as my ‘scope and mount, so it doesn’t get used too much.
Unless the mounting system is solid, easy to set up, balance and use, I suspect it will be more of a hindrance than a help?
Cheers
Dennis
PS – the 45 degree eyepiece arrangement on the Vixen 30x25’s are fantastic for both terrestrial and astronomical viewing. I suspect that straight through would not be suitable for astronomical observing at altitudes over say, 60 degrees?