I'm sure this has been discussed before but I wasn't able to find much specifically on the topic, but I have been doing a lot of color with my dd machines and have been trying different bends and rubber bands and what not but I still have a ton of noise from the needle in my disposables . I have a dan kubin dd and an old timer and a Darkside dd and mainly I have the issue with my kubin. I use both kingpin an mithra tubes and either one does it .. Not sure if it's better to bend the needle a bit or not , a lot of tension or little tension etc. I guess the noise is from the top of the needles at the solder point hitting the sides of the inside of the tube .. ? Love the machine but I can't stand the noise lol.