Does anyone know of a source of brass inserts for the carbon express heritage 90 shafts. They are an in betweener size and any help would be appreciated. tom

No,but you can chuck a field point in a drill press and screw a brass insert into it, then turn it down with a file. Best I recall, a filed down 100 grainer will weigh around 82-84gr. when sized to fit. Or, you can use the PDP weight system with the 10 and 30gr. weights (the 50gr. weights won't fit). lol
Barry