I'm using the same type Mapex, it's 'rock solid' and great when sit or at more 'half standing' level.
Sometimes I wonder if it's buildt especially for my big butt. .....

Update:....After deep thought & consideration I have sadly decided to return the Quiklok DX-749 mostly due to Size & Weight & move in a different direction. Definitely a great studio seat for sure but for traveling, loading, practicality, etc, not so much. Too bad, I really liked it as a super quality built stay home or studio piece of gear.

Carry On

I've been using the Quik Lok BX 718 for over 10 years. Quick setup/break down, doesn't take up much room in the SUV, it's comfortable and height adjustable.

http://www.quiklok.com/catalog/?p=productsMore&iProduct=234&sName=BX-718

I have that model Quik Lok BX 718 also fine for sitting,
......but this post was all about the HEIGHT (OP) need 30" with back rest for Half Standing & folding for this situation.
This one is working out nicely...

Jim these are very kool seats for playing keyboards also
all styles & colors to choose too...
http://www.steelseat.com/pricing.html
I am still considering one of these versions down the road very nice.
http://www.steelseat.com/testimonials.html

Donny, that folding one with backrest looks like something I’d definitely be interested in.
I sometimes sit and sometimes stand at different times through a night, so something with that kind of height would be ideal.
You are the “linkmaster” so..... where’s the link for it? 🤔

https://www.eventstable.com/folding-barstool-with-backrest-black.html

Jim, I looked at these when they first became available, not very comfortable, not cushioned, just hard plastic. Not good for musicians when a bony arse, like me.

I use the Quick Lock DX-749, which has a padded seat and backrest, and everything is adjustable. I weighs about 20 pounds, folds flat and your back and arse will thank you at the end of the night.

[img]https://i5.walmartimages.com/asr/04a9879...mp;odnBg=FFFFFF[/img]

Gary

Gary I have a great memory foam pillow that solves that problem..... The dx749 is a beast to tote..

Why carry extra pillows when you can wear Musicians Friend Memory Foam Underwear. Comfortable on any seat for long gigs. Although they may make your ass look big.