so you would be drawing an arrow to the field tip or head about 29 inches,, this is the strain the bow would feel,,
double that and you get about 58 inches,, that would be a good starting point for a bend in handle with sinew,
for your 52 inch wood,, make the best bow you can ,, get the most you can,, and the draw length will be what it is,,
probably around 25 or 26 before string follow off sets any gain in performance,,, you would get from increasing the draw,,
keep in mind your funtional draw can adapt to a shorter bow with practice,, it is more work, but very doable,,better to have a funtional bow,, than trying to get too much draw from a shorter stave,,
Proper Form is very subjective,, when shooing a bow with 20 inch draw,,, your form will vary quite a bit from a 29 inch draw bow,,
that being said there are guys that get quite a bit more than normal draw from a short bow,, but have made alot of short bows and know how to push the limit,,