Welcome aboard!
I love my Mystery Ranch pack. Use it for everything.
I've always had issues with clothes fitting as well.
Been a big dude my whole life, although not as tall as you @ 6'3" but I'm long torso'd and more round.
I've wanted to sew gear for a long time. Was always intrigued by sewing machines.
I was always mezmorized watching my mom or grandma sew.
I started losing a lot of weight about 1.5 years ago.
When the lockdown happened, I was furloughed for a few months, so I bought a machine and taught myself how to tailor all my clothes that were now way too big.
I disassembled pants and jackets and put them back together in a smaller size.
Altered a bunch of my camo clothes and gear.
Get yourself a good seam ripper!!
Then started fooling around with gear making etc.
Made a bunch of 2 piece belt systems, IFAKs, mag pouches etc.
I was using a Singer Heavy Duty 4422. The poor little machine was really struggling.
Here was my first belt, ifak and pouches I made with the singer.



That led me to buying a Juki 8700H and I really started making more heavy duty stuff.
Did a few tubes cumberbunds.


I made a few slings for myself and then buddies. Got a lot of good feedback, then jumped in and started making and selling them.
I wasn't really planning on selling stuff when I first started making gear. It was just going to be for myself and friends.
I think a lot of guys start that way.
Here is what I'm up to now. I can't seem to make them fast enough!


I really want to start making clothes and other gear, but the slings are occupying all my time.
I have lots of various materials on hand to make combat shirts etc.
Was going to make one for for summer and 1 for winter.
Have a bunch of Merino wool, polartec waffle fleece etc.
So many ideas, so little time.
I've been curious to try out a backpack kit as well. Let us know how yours turns out.