What Jim L said.
Personally I prefer to have no boom on the staysail. With a double-reefed main you have a well-balanced miniature rig for heavier conditions, with the ability to sheet the inner jib more properly like a real jib. My experience with C44s is that the staysail boom divides the foredeck, makes for a terrific headknocker and places more demands on the rigger, such as the needs for:
1. A real topping lift, not just a wire to the nearest point on the mast.
2. A proper outhaul with at least 2:1, preferably 3:1 purchase.
3. Sheetline tackle, preferably with a traveler. The sail will have to be cut short of the end of the boom to provide a proper lead from the clew to where it's attached. Here is where the topping lift comes in; without it, every adjustment to the outhaul or sheetline raises or drops the boom's end. It's just awful.
4. Ditto for when you reef it. It's never good to have only the sail supporting the boom; that's for very small dinghies only (and on my Rhodes Robin I fitted a topping lift just the same).
All of the above are eliminated when you go to a loose-footed inner staysail. (Please just don't call it a 'cutter jib' or a 'cutter sail'! --I posted on this a good while back.) The trick in sailing with two headsails is to mind both slots. Let the outer jib take the lead; draw it in but not entirely taut and then adjust the staysail inside it. Then play mainsheet traveler and outer jib till they all work together. Ideally all three should contribute to the same curve from outer forestay to mainsail leech. You can spot a good slot by the fair curve of the vertical space too: have no intersecting lines. With experimentation, observation and patience you'll find the best advantage to all three.
I like the inner staysail as the only sail up on a boat when motorsailing or in a bad blow. It balances the boat well and, with a roller furler, is easily tended. Also when flying a spinnaker, this is a nice 'splinter' (I'm dating myself, you can look up the term) under the radial-head (but check race rules to see if this is allowed).