I'm looking to layout some flues for a camp we're building. Looks like I can use some help in this department. Here's my first question, I'd like to install an antique wood range on one side of the room and a wood fired pizza oven on the other side of the room. They will be about 14' apart. I'd like to vent the flues through the center of the gable roof which means I need a tremendous horizontal offset in both flues. I can find data about using 30 degree elbows to offset. The table shows that there would be a 27-1/4" horizontal offset with a 4' length. My question is can I use three pieces of pipe to obtain am 81-3/4" offset at 30 degrees from vertical? TIA