Hey guys, hoping for a bit of advice

Bought an ASWB F80 stick bait, gave up up on it at first as I couldn't get the right movement, but I've finally figured it out and have now done very well in catching GTs with it

I've now bought the next size up (f130) but no matter what I do I can't get it to swim like the smaller sized one. It tries to act more as a skip bait with its head always above the water 

I've tried all sorts of rod actions and have swapped around different sized trebles and singles to change the weight distribution but can't seem to get it... every now and then it'll swim perfectly, but it's a complete fluke

Any advice? Thanks!