I just inherited an older 4 harness 4 treadle loom. When I want to do a plain weave do I go through each treadle, 1-2-3-4 and then start again or do I use 2 together, 1+3, 2+4? Never used this type of loom, a newbie here can you tell? I have learned on a 6 treadle loom with heddles 1+3 and 2+4 tied up together. This is where I have no idea. Thank you!