First upgrade, I know it’s not much but darn those original hoses was giving me a heart attack.
I like your “duct tape” job. Pun intended, lol
Haha, well, the factory fan was not that good of a fit, so I made a hillbilly fix 
hi, you upgrade K40 machine? We are manufacturer for K40, anything need our help? My email is amber@htlasercnc.com
@Haotian_Laser We know your Email by now you publish it several time. Please keep your post in a constructive way to the forum (with solutions) and not looking like spam. you do not need to post your email any more. I did block your 2 other posts today for that reason.
@StephaneBUISSON ok, thanks for your kindly remind.
I thought the tubes were bent like that by design, to stop too much pressure reaching the tube. (kidding!)