I really like this knife, but compared to other slim knifes this one was very heavy. Due to its basic shape I just sketched and reiterated until it fit perfect. One of them needs to be mirrored, this is how you can swap the handle around. I would also add some modifiers to increase walls around holes. This is already done in the .3mf

Just adjust wall count to 1-2 and 0 for the top layers, then choose the infill pattern and percentage you like. Larger voids do feel better in the hand. I also replaced the ‘bearings’ for larger diameter brass washer. Not sure it made a difference, but I'm happy.

Knife listing: 
https://www.amazon.com/FUNBRO-Folding-7CR13Mov-Stainless-Survival/dp/B0B824PKTF/