We have some of the new design top caps to help people dial in their 37s easier or those who just do not like the v1 style. I have personally tested these top caps and purposely wicked loosely and have had zero leaking. If you are struggling with your 37 this will help you out. These will be the new standard on the def tanks. Black are due to arrive hopefully within next month.
*disclaimer - some of the top caps have minor defects(small dings) in them. We waited 4+ months for china to ship them and not much we can do about it with the current state china is in. If this is a issue for you we understand and please do not order one. The defects are not bad but their are some with them so to keep transparency clear with feel our customers deserve to know this before spending money.