I can't say I'm as skinny as I once was;) But I remember that still, I'm not fat but I'm 6'2 and around 200-220lbs depending on what the wife is feeding me and how much stress I'm under;)
Anyhow this is right in my neck of the woods, I don't often talk about my "shop" and actually these days that could be considered plural. So I'm a holster maker, been building leather rigs for the last 10 years as my only profession. Last year I expanded into kydex(with another name).
So
www.adamsholsters.com is all my leather gear, and
www.kymeraholsters.com is my kydex stuff, both sites are setup to crosslink but some guys don't realize they are both me. I kept them apart because of lead times, the leather being much slower to produce runs 12-18 weeks on average, where the kydex is sub a week.
Anyhow back to topic at hand. Position will depend on your mode of dress as much as anything else. Appendix is very popular these days, but it's not my favorite. Personally for concealment I'll run my AH Texas rig strong side around 4 o'clock typically with a 1911 either a 5in. or 3.5in. depending on the day. Normally though since I'm open carrying in and around the shop/house I carry in my Overpass holster closer to 3 o'clock with my 5in. 1911. Mags don't change for either, I run them in a Texas mag carrier weak side around 8 o'clock and typically it's a double mag carrier with a mag and the front pouch is my Gerber MP400 multi tool that I'm lost without;)
That setup/position lets me pretty much do whatever I want with it comfortable and staying out of my way. I can go lay under the truck and turn a wrench or I can sit in the shop and stitch leather. I've driven cross country with the same setup in the Jeep as well as the motorhome without any issues at all. So that's my goto no BS solution for all day everyday carry;)
Luke