Peace be upon you, and Allah mercy and blessings Due to the many friends who request the making of the lower rell, we are excited to make it from buying, Actually there are also in stores, but the material is rather thin and quickly abis due to friction under the door hrnderson wheels in the long run. Ok .. This time we make a special starter with iron elbow 3x3cm 2mm thick and 2.5cm x 2mm strip plate The length and width of the bottom rell must be the same as the top rell ,, more than 6cm to later simplify the process of installing the wheels. The construction is quite easy because we just trace the arch in the upper rell bends, with the welding position outside so that later it does not interfere with the activity of the lower wheel .. Hopefully useful and inspired. Wasalamualaikum wr, wb. #weldertasik #pintuhenderson #rellbawahpintuhenderson #technique #rollmanual