adding weight up front will reduce your spine. I shoot gold tip 5575 out of my 55# recurve cut to 28.75" and with 200grns total up front and 3gpi weight tubes. Arrow comes out finished at 550grns. I bareshaft tuned to arrive at that combination. I recommend you do the same and predict you will need some combination of weight tube and insert weights if you want to come out around 10 grains per pound of draw weight. What that combination will be I can;t tell you offhand because there are too many variables that go into tuning such as string type, brace and knock hight adjustments, amountof center cut, etc..
One tip though when tuning carbons, if you use a bag type target and a bit of paper to make a friction fit between the shaft and insert, you don't have to glue up until you are sure you are dialed in.