How to Make Compression Stuff Sack for Sleeping Bag MYOG DIY

Using leftover scrap fabric from my tent and down bag projects to make this compression sack. Final product is three times lighter than my "sea to summit" sack and weighs only 40g (1.4oz). It can fit my winter down sleeping bag and when fully compressed is about 20x20cm or 8x8 inches. 0:20 Compression sack is basically main body with lid and bottom, held by 2mm cord on the side. The top and bottom are of waterproof nylon just if it pours or I place pack on really wet ground, the bag stays dry. The middle or main part is of same lightweight 0.66oz per yard ripstop nylon as my sleeping bag. What you need: 1:44 -Light weight nylon or polyester material 70cm x100cm (if one type of material) 70cm x 50cm (30"x20") main body, and 50x50cm (20x20") lid & bottom -Waterproof heavier nylon if you want it waterproof or partially waterproof -2m (~2yrds) of 2mm cord -(4) Lineloc or some other tensioners -30cm (12") thin 1/2 inch webbing -1 cordlock -Sewing machine and ideally polyester thread Steps: 1. Cut main body material. All depends on type of bag and size of bag but in my case a 930g or 33.5 oz down bag, main body section was 66 x 46cm or 26x18" 2. Cut material for top lid and bottom sections using squares. Both 25x25cm or 10" x10"in 3. From above cut circle portion. Best to fold material in half. Diameter should be 25cm or 10" 4. Save cut out corners from step 3. We will use these as side straps 5. 1:50 Hem sides of main body (1/2" allowance) 6. 2:30 Hem lid and bottom sections 7. Cut thin webbing and cord in 4 equal pieces 8. 4:25 Burn the ends of cord and webbing to prevent fraying 9.3:00 Feed webbing through lineloc and sandwich between pieces in step 4 10. Partially stitch them and turn inside out 11. Close stitch open end and reinforce on top and reinforce stitch. Do total of 4 pieces 12. 4:27 Repeat similarly with bottom portion of sack but using cord until you have 4 in total. Make sure when stitching on top to go over cord 13. Attach 4 triangular pieces with linelocs to lid. Make sure you mark in lid equal distance points 14. Repeat the same for bottom portion 15. 7:40 Fold top of main material and add cord. at designated top. You may want to add a bit of webbing material at exits for reinforcement. 16. 8:30 Close stitch main section creating an open like tube. Stitch on the inside and then turn material out. You may want to do two lines for added strength 17. Attach bottom portion to the main compartment. Stitch from inside. The circular material may bunch up during stitching so try to mark points (say 4) at equal distances. Do at least 2 stitching lines here. I did 3. 18. Attach a lid on the side of main compartment maybe an inch from the top. Use side corner to do it. Stitch well or add a small reinforcement piece 19. Feed your cord through licelocs Done!