My 18 has just about 23 lb of actual lift, my 35 is almost 43, if I only had the 35 for cold and warm it wold dive perfectly and although it’s not bulky it about twice as bulky that the 18 which is why I use a different wing in warm water, it hours of plane travel to get to warm water and rarely a direct flight and I don’t trust the airlines to get my dive stuff there, light and compact matters.