Are there any issues with the Ventcore backing collapsing or folding when the pistol is drawn or re-holstered?
I have carried with several of the big-name (online) IWB holsters...mtac, ctac, supertuck, maxtuck, ventcore, versa max II, don hume, Theis, and others.
The ones I most recommend as a general rule based on that experience, in order, would be: Stealth Gear Ventcore, Theis, and MTAC (for all kydex)
That said, the hybrid style IWB (my preference) isn't as easy and foolproof to reholster as an all kydex. They ALL collapse inwards to an extent under belt tension, that's just the way they look. So (and I had a thread about this not long ago, most people seemed to do the same) I look the gun into the holster when holstering into my IWB holsters. IF you are insistent on re-holstering without looking, you may not want a hybrid IWB holster of any make. Or all leather. IME no matter how reinforced the make the opening it's just not the same when you holster up as an all kydex is. But that's fine with me, all things considered
Don't take that to mean you can't re-holster one handed without looking, you certainly can. Just a little more technique dependent than an all kydex.