01 Supra 22 SSV surf wave

I have an 01 supra sunsport 22 ssv (basically a launch) and am trying to dial in the surf wake. the previous owner put 2 seperate trim tabs on the boat, instead of the one in the middle, which allows me to push one side of the boat down. im having trouble getting a big wave that is consistent, it is either too tall and hard to actually whip and trick on it, but the sweet spot is big; or too small of a sweet spot but easier for 3's. i have the stock ballast, which is around 800 in the front i believe and im guessing about 300 in the back right compartment? i also have a twin water bed when there is not enough people, and fill that about halfway up in the middle of the boat on the side. is there anyone else with my boat that can help with their surf setup? also should i pull both tabs up when surfing? someone told me in a different post that they keep the front of the boat out of the water. i only put down the tab on the opposite side of the wake about half way, and i run 11.7 mph. thanks