Posted:possibly. i agree with nx: the size doesn't matter that much (so to speak), and big flames interfere with contact.
FYI, double burners (i've had double 65cm burners in the past) give a huge flag of flame for the first couple of minutes, and then burn down to separate flames.
i'm currently building contact doubles to the following recipe
1'' chrome steel, filled with similar-gauge broomsticks (or dowelling = in 4' lengths, fixed together with dowel screws), cut to 5ft lengths, roughly (i'm pretty short . . . these are long for me) + 75cm x 10cm kevlar wick on each burner [x2]
i decided against bigger wicks, for a variety of reasons - partly cost, partly that i want to keep some distance between my face and the flames. as it stands, i've got 10cm wicks for a 1.4m staff; i do reckon 14.5cm wicks might be a bit big for a 1.3m. but if you've got an intuition one way or the other, i'd go with that, rather than relying on other ppl's opinions