Love scotch/barndoor mounts, even tho i have never built one - collected plans for them off the net and from mags for years but never actually made one lol
And with stacking/dslr's they are coming into their own again I feel - as you have amply illustrated Andrew
Thanks for posting this brilliant in its simplicity alternative to bought mounts.
there are really a no excuses for not having tracking now
cheers!