Arrow for new bow question

[9 Shocks]

I have a primaltech longbow in the works.

It is 51@28 and I draw 26.5.  I am thinking of shooting a 1916 cut to 29-29.5 depending on tuning with a 145-175 grain point.  Does this seem accurate?  Or a good place to start?

I was thinking about going to an 1816 but I want a little heavier arrow and a slightly longer arrow around 29-29.5

I know tune tune tune but I am just looking for some input.

Thanks

[Alexander Traditional]

At that length you might be better with a 2016.