2nd update -
Well we tried the again without the microfire insert, used inserts I had at home (minki super soaker and 2 hemp) but still leaked so I think the fit is just not right for my big boy.
I think we'll continue with the one motherease bedwetter pant that we have and look to try something else. Any suggestions - must be pull up or have side snaps? Was thinking about the Blueberry Side snap but have been put off by the price.
I'll use the ecobubs as a day nappy for our little boy at moment but might sell it on soon!