I noticed my palate being a bit too narrow at the front to the middle to fit my tongue comfortably between my teeth and on my palate. The back part is nice and wide, though. Currently using my thumbs in an attempt to achieve expansion but looking for a more comfortable and effective way. Anything I can do to expand my palate without conventional appliances or dangerous facepulling methods? Preferably something I can maintain for longer durations than using barehand strength. My goal is to create more tongue space to be able to "mew" properly without my tongue curling at the sides.
What do you mean by conventional appliances? There are saggital appliances that direct expansion... see my post "Lab visit with pictures"... This top one fits what you're talking about. It's a fan shaped appliance.
For a more nuanced control, I like the double screw design... 
Skull and Jaw Correction
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