The mysterious thing about foaming issues is you can hold the plane in your hand and cancel out the bubbles.
A Jett bubbleless tank might seem extravagant or overkill, but once you get in the habit of using them they are easy enough to use. If the plane lacks the room for a generous amount of foam, the bubbleless tank is a smart option.
SIG sells the best foam I've ever come across, BTW.