UPDATE

Got him an 18 cm plastic plant saucer and cut out an entrance for him using scissors, he already partially checked out the hide but hasn't gone fully in yet. It's /really/ low ceiling and /almost/ touches his back, should be nice and snug for him but he can still maneuver inside of it, I was gonna get him a 25 cm saucer but the store was sold out, I might check again later if they have the 25 cm ones. But, hopefully this is improvement from the medium size plastic RepTech hide that you guys said was too big for him.

I also switched out his red light to a CHE to keep his cool spot at the correct temps, I haven't been able to rig it up yet so for now I have to keep it straight on top of the lid of the tub and just switch it on and off to keep his cool side temp at 25C. His hot spot is set to 32C (plugged to a thermostat) and his humidity, right now, is 80%.