Anyone know of a place to find native NetSuite field properties like MAXLENGTH? (I'm sure this has been asked a load of times)

Did you try schema browser?

ya

there are three different types there i was about to say

though I'm not sure those are all strictly accurate unless they've updated it a lot

If you want to be accurate, in the UI you can right click on the field and inspect it. One of the tags is maxlength

Thanks all!