a good backplate and wing system can be both lightweight and travel friendly or heavy to remove lead from one's belt.
A Backplate and wing system can be both very high quality and inexpensive or very high quality and also very expensive.
A good backplate and wing setup can/should be comfortable, form fitting, streamlined, and infinitely adjustable.
A backplate and wing can be a one time purchase that can be adapted for use in virtually every diving environment (except tight sidemount only caves).
A backplate and wing system can be used for single tanks, double tanks, or more tanks.
A back plate and wing system works
equally well for technical and recreational diving.
I can go on and on if you like...
Check out:
Halcyon
Deep Sea Supply (DSS is on the boards)
Dive Rite
Hollis
Zeagle
Oxycheq
Salvo
FredT (on the boards)
Hammerhead
OMS
This doesn't need to get complicated, all these brands make components that are interchangeable with each other and several brands offer complete kits. Tobin at DSS is a great resource so I suggest you get him a call.
You would need to order:
1 plate (come in plastic, aluminum, or stainless, or even soft packs)
1 wing (come in a variety of sizes 30lbs or less is generally accepted for single tank use)
1 single tank adapter with 2 tank bands
1 hog harness kit: 5 D-rings (or more)
7 belt slides (or more)
5 yards or so of 2 inch webbing
a few feet of 1/8" bungee cord
1 belt buckle
here are some links:
Hogarthian System - Dive Gear Express
https://www.deepseasupply.com/index.php?page=rigs
http://www.omsdive.com/downloads/OMS_Continuous_Weave_Harness.pdf
YouTube - Threading a Backplate System
Equipment Configuration | Global Underwater Explorers