I had a guy in an archery shop tell me today that I should never use hot glue to put inserts into a carbon shaft. He said the heat would break down the carbon. He said this was especially true when you use enough heat ( via blow drier etc.) to heat the glue,inside the shaft,enough that the insert can be removed. If this is true, then how do you try a particular weight on an insert, remove the insert and weight, cut the length of the shaft and re-insert when finding the right weight and length of your carbon arrows? What do you guys do?