Do I need the mid stay as it will get in the way as the main -stay -furling -sail unfurls.
What do you mean by "mid stay" and "main stay"? A picture would be nice.
My guess is that you are concerned about a large headsail, attached to the forestay (or headstay), hanging up on an "inner forestay" when tacking or gybing. If it's easy to remove, I'd just detach it while sailing with the genny. More imortantly (the reason for the picture request) we need to know how close to the forestay is the inner forestay. If the gap is a few feet or more between the two wires then you can leave everything in place, but just change your tacking technique. Instead of tossing off the sheet at first and letting the wind push the sail across the foredeck, you should hold off and just release a foot or so until you can see a bubble in the luff section push into the gap. Keeping tension on the sheet will force the wind forward to the front of the sail. Once the bubble expands and starts pulling the sail forward you control the release of the sheet until you can feel the entire sail rushing towards the gap, It's very important that you don't pull the new sheet harder than it takes to just remove the slack. The wind will do all the work. This move requires practice, but is a very satisfying accomplishment.
Boats with adequate crew wil often send one forward to help the sail through the gap. Very large genoas will often need help getting the saill around the MAST, not just a tight gap created by an inner forestay. So if you have people confindent in going forward to handle sails, this is a good time to put them to work. Easy.
For shorthanded situations, there is another method but it requires making alterations. That would be to install a cringle (grommet reinforced hole) in the foot of the sail midway along its foot. You would attach a line to this mid point, run it forward to a small block anchored near the tack and back to a convenient cleat. The purpose of this line is to pull the center of the sail forward to the gap between forestay and innerforestay to assist formation of the "bubble" that will pull the sail through. I have used this method and it is quite effective.
Okay.... what if the inner forestay is extremely close to the headstay.... this is seen most commonly with roller furling equipped headsails, where there is a large furled reaching sail on the stem or sprit and another stay for an upwind sail right behind it There are two solutions. It can be a "gybe only" sail... where the sheets would be run outside like a gennaker. Or.... and this would be more practical... you would simply roll up the sail, change direction, and roll it out on the other side. If you are using both sails at the same time this method would work also. Questions? good luck,