Cloth Trainers #4: Back to the Drawing Board

So my "Cloth Trainers #3: Finale" post was a little premature. After more than a month of staying dry virtually every night, Tate is back to being wet almost every morning. The EcoPosh trainers are definitely not enough protection for him. The absorbency with the Joey Bunz Premium Hemp Insert and TPU lining isn't enough to stop a nighttime leak from a heavy wetter. If I cover it with fleece (because he won't wear wool), then it is enough to keep his sheets dry.
I won a GroVia trainer and was excited to try it, but the results are still the same-- wet sheets in the morning. I have tried it with AppleCheeks bamboo double fold insert and another time with 2 Thirsties Hemp Inserts. Neither was enough absorbency. In the picture, I used a toddler prefold as the insert. I stuck a premium Joey Bunz hemp insert over the top of the trainer and covered with fleece shorties. Eventually he told me it was hurting him. I suspect it was digging into his chunky thighs, so I have no idea if it would have been successful.

We have been using some supped up undies with fleece shorties. I even ended up covering one pair with fleece so it's more like an all-in-one pull up style trainer. Those were working and still do most of the time, but sometimes it still isn't enough. In a desperate move I even put a toddler prefold and the Joey Bunz inside a pair of regular underwear.

 Here's what goes under the fleece: 2 layers of OBF (organic bamboo fleece) inside on wet zone, outside covered with 2 layers of flannel, 4 layers of OBV (organic bamboo velour) and 2 layers of flannel outside on wet zone

 "modeling"

I will have a few more experiments to try and at least one other failed experiment to share. Any ideas or suggestions for a heavy wetter are more than welcomed... cloth only, of course! :)