Classic (KS2) Cobra Bag Spring

Overall, Spring reflex action is good but DIY build can be improved. Some of this could be be me but want to share issues I ran into during build.

1) Finding a 3/4 & 1 Inch metal pipe that fit between each other is tough. I tried HD, Lowes, Menards, etc and didn't have success. I spent 3-4 hours using hammer and sanding tools/brushes to make things bit more manageable.

2) Butterfly clamps are good but need something more sturdier. Jabs are great but if you plan to mix Jab with uppercuts you might send the pvc pipe flying upwards. I have to hold back power on uppercuts to overcome this issue. My thinking is that better or more clamps are required to overcome this issue.

3) I have no vibration or sound when I use the bag which is great. If you pay close attention to the build it should be mostly sturdy.

4) I did not build circular base and choose rectangular shape so I could put two 55 lbs plates (total 110 lbs) on the base. I attached flange to a rectangular shape pressure treated wooden board (approx 1.5 inch thick and 10 inch by 40 inch). I am realizing circular base would be better. I will rethink this later.

5) Note, with amount of time spent to get the metal pipes to fit in one another and $'s spent (Metal Pipes, pvc pipe, flange, pvc connector, butterfly clamps, bag, spring, duct tape, funnel, screws, and wooden board), I would highly recommend just buying the whole kit vs spring. Now, if you have some of these things at home already, then you may find it beneficial to buy spring and build. This was not the case for me.

Lastly, let me just point out that the bag is so much fun. I have gotten smacked in my face a few times but still enjoy very much. Thank you

Incredible product, if you follow all the steps on his website and YouTube demonstrations, you will succeed in making your DIY cobra bag. Thank you Reedy and team for sharing your love and creativity with the boxing community!

Hey Reedy, Yes, so glad I sprung for the KS2 Spring and definitely the added KS2 Spring Caps.
Made a tremendous difference from when I started with just the 3/4 inch PVC pipe alone. That was NOT working for me. The solo PVC had Very little spring and continuous bounce for sure.
Will try to send pics of final
Product. Going to buy a Coupling to add 4 inches now and have really fast Cobra bag and one slower bag without changing height OR compromising the Spring longevity.
Did get whacked in face a few times, but that's the learning process.
Thanks for ALL your videos that helped tremendously with the build. And of course a "shout out" to "cssquaredboxing" videos for all his videos and input where he always mentions Kewlus. Com

Incredibly well made, very sturdy and amazing customer service.

The quality of kewlus products are amazing. Definitely takes some abuse. The leather feels really good. Putting it together everything was super easy And you can Tailor it To your body type. You can buy extra PVC and galvanized steel pipe So you can tailor it to kids or wife. Definitely recommend kewlus products to any body looking for high quality boxing equipment.

Still haven't got my product