I ordered some of that Viton tubing from McMaster car, comes out to $10 a foot! I tried using BVM clunk like 6mm but it wont let clunk reach the front of the tank (the big digitech clunk) as the line binds on the side of the tank. Im wondering I should remove the orings off the clunk as well.
Its still going to suck significant air when the tank is 1/2 full and I rotate upside down or do a dive. Im hoping the new tubing will fix it. If not, I do not understand how no one else has this issue unless they dont fly upside down or do long dives.