If you want a travel case, I love this one. Don't be scared off by the "basics" label, they make good stuff.

I don't use a during-use case though, so no help there.

http://www.amazon.com/AmazonBasics-Netbook-10-Inch-Netbooks-Touchpad/dp/B002VPE1Q6/ref=dp_cp_ob_e_title_3

I've heard good things about this.

I purchased this one:

https://www.amazon.com/gp/product/B002VPE1Q6/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

I only need some cover for the winmax and the charger as im using a backpack to carry it everywhere with more stuff

BTW another user posted his case

https://www.reddit.com/r/gpdwin/comments/h9klbh/backer_36_im_so_ready_for_the_win_max/

i also checked some hard shell cases for 10" tablets or wacom tablets, but the amazon basic case is enough for me

hope you find your perfect case!