Above is the finished rig with the Glock-19 which (to me) carried better with the gun-side tie-downs (shown) than it did without.
Above is the same rig with the smaller Glock-26 which I (usually) found to be an agreeable carry without the gun-side tie-downs.
Carry-comfort levels were close between the two pistols but the smaller Glock-26 (full 12-round mag plus a chambered round) has the edge over the Glock-19 (full 15-round mag plus a chambered round). However, due to the recent local and national (ahem) social unpleasantries the few extra rounds of the G-19 did earn it more ride time.
This rig started out as a complete Classic Lite Shoulder System
The offside tie down is a component-purchase used to replace the normal spare magazine pouch. The J Frame .38 is my backup for this "no reload" rig (I do have mag pouches for pocket and belt if I ever felt the need to carry supplements).
The Classic Lite harness (same high quality harness as on my Glock Jackass rig) was the base of this rig assembly. The Classic Lite single mag pouch (which I still consider as an option for this rig because I do like it better than I do the component double mag pouches; the single mag pouch is unavailable as a component purchase) was replaced with the aforementioned offside tie-down component. The Classic Lite holster, as suitable as it is, was replaced with the classier looking component-purchased holster shown below with the Glock-26 (yeah, I'm a bit of a leather snob).
Due to it having a longer nose and more butt than does the Glock-26, only my darker colored lightweight summer shirts could adequately camouflage the lumpier Glock-19; the Glock-26 was a much cleaner carry under the lighter colored shirts.